Explain How Evidence Supports a Claim
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AP English Language and Composition › Explain How Evidence Supports a Claim
Read the following embedded passage and answer the question.
A neighborhood association president claims that planting street trees is a cost-effective way to reduce summer heat stress. She points to a three-year initiative that planted 220 trees along two major corridors. During the most recent July, surface temperature readings on shaded sidewalks averaged 9°F cooler at noon than readings on adjacent unshaded blocks, and the local clinic reported a 14% decrease in heat-related visits from residents living within three blocks of the corridors compared with the prior July. Opponents argue that the clinic numbers could reflect other factors, but the president emphasizes that the temperature difference is a direct measurement of the trees’ immediate impact.
The author uses this evidence to suggest that…
surface temperature readings on shaded sidewalks averaged 9°F cooler at noon than readings on adjacent unshaded blocks
trees measurably lower the heat people experience in daily outdoor spaces, supporting the claim that they can mitigate heat stress efficiently
the corridors received more funding for clinics, which is why shaded sidewalks were cooler
trees eliminate all heat-related illness, proving that shade alone fully solves public health problems in summer
shaded sidewalks were 9°F cooler than unshaded ones, meaning there was a temperature difference between them
Explanation
This question asks you to explain how evidence supports a claim about street trees reducing heat stress. The evidence that shaded sidewalks were 9°F cooler provides direct, measurable proof that trees lower temperatures in outdoor spaces where people walk and wait. This temperature reduction supports the president's claim that trees are a cost-effective way to reduce heat stress—the physical cooling effect is immediate and substantial. The connection to reduced heat-related clinic visits strengthens this support. Choice B overstates the impact by claiming total elimination of illness, while C invents an unrelated funding explanation. When analyzing environmental interventions, focus on direct measurements that demonstrate the claimed effect.
Read the following embedded passage and answer the question.
A museum educator argues that free admission days can broaden participation without diminishing visitor engagement. She cites a year in which the museum offered free entry on the first Sunday of each month. On those Sundays, the share of visitors from ZIP codes with median incomes below the city average rose from 18% to 33%, and the average time spent in galleries held steady at about 74 minutes, matching paid-admission Sundays. Some donors worry that free days attract “casual” visitors who rush through, but the educator maintains that stable visit length suggests comparable engagement.
The evidence supports the author's claim by…
the share of visitors from ZIP codes with median incomes below the city average rose from 18% to 33%
proving that the museum’s overall revenue increased on free days, which is the best measure of engagement
indicating that visitors stayed longer in galleries, which directly demonstrates higher income levels among attendees
showing that removing a price barrier brings in more visitors from less affluent areas, supporting the claim that free days broaden participation
noting that the share rose from 18% to 33%, which means the percentage changed over time
Explanation
This question requires explaining how evidence supports a claim about free museum days broadening participation. The evidence that visitors from lower-income ZIP codes increased from 18% to 33% directly demonstrates that removing the price barrier attracted a more economically diverse audience. This supports the educator's claim that free days broaden participation—the museum is reaching populations who were underrepresented during paid admission. The stable visit duration shows these new visitors are equally engaged. Choice B incorrectly focuses on revenue rather than participation, while C misconnects visit length to income. When evaluating access initiatives, examine how demographic changes reflect the stated goal of broadening participation.
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A technology columnist argues that requiring two-factor authentication (2FA) for school email accounts improves security without significantly increasing help-desk burden. After a district enabled 2FA for all staff, successful account takeovers dropped from 27 incidents in the prior semester to 3 incidents, while help-desk tickets related to login issues rose from 410 to 455 during the first month and then returned to baseline the next month. The columnist acknowledges the initial spike in tickets but argues that the long-term tradeoff is favorable because compromised accounts can expose student data and trigger costly recovery work.
The evidence supports the author's claim by…
successful account takeovers dropped from 27 incidents in the prior semester to 3 incidents
demonstrating a substantial reduction in a key security failure, supporting the claim that 2FA meaningfully improves protection even if it causes minor short‑term friction
showing that the district eliminated all cyber threats permanently, proving that 2FA makes any further security measures unnecessary
stating that takeovers dropped from 27 to 3, which means there were fewer incidents
indicating that staff members forgot their passwords more often, which is why account takeovers decreased
Explanation
This question requires explaining how evidence supports a claim about two-factor authentication improving security without excessive burden. The evidence that account takeovers dropped from 27 to 3 incidents demonstrates a dramatic improvement in security—a nearly 90% reduction in successful breaches. This substantial reduction supports the columnist's claim that 2FA meaningfully improves protection, justifying the temporary increase in help-desk tickets. The return to baseline ticket levels after one month shows the burden was indeed temporary. Choice B overstates by claiming permanent elimination of all threats, while C creates an illogical connection. When evaluating security measures, weigh the magnitude of security improvements against temporary implementation challenges.
Read the following embedded passage and answer the question.
A high school principal claims that later start times improve learning more than they disrupt after-school activities. After shifting the first bell from 7:20 to 8:10, the school found that first-period tardies dropped from an average of 38 per day to 14 per day, and the nurse logged 22% fewer visits for headaches and fatigue during morning classes. The principal also reports that the percentage of students earning D’s or F’s in first-period courses fell from 19% to 11%, while coaches report only minor scheduling adjustments. A few parents complain that students are simply staying up later, but the principal argues that the reduction in fatigue-related nurse visits suggests otherwise.
The evidence supports the author's claim by…
first-period tardies dropped from an average of 38 per day to 14 per day
demonstrating that after-school sports became easier to schedule, which is the primary goal of delaying the start time
showing that students are arriving more consistently when the day begins later, implying the schedule change reduces barriers to attendance and supports improved learning conditions
proving that every student now gets more sleep, which guarantees higher test scores in all subjects
restating that tardies decreased, which indicates there were fewer tardy students
Explanation
This question requires explaining how evidence supports a claim about later school start times improving learning. The evidence that first-period tardies dropped from 38 to 14 per day supports the principal's claim by showing students are arriving more consistently when school starts later. This improved attendance creates better learning conditions—students who are present can actually benefit from instruction. The connection between reduced tardiness and improved learning is logical: students must be present to learn effectively. Choice B makes an unsupported leap to guaranteed test scores, while C misidentifies the primary goal. When examining how evidence supports educational claims, consider how the data connects to the learning environment and student readiness to learn.
Read the following embedded passage and answer the question.
A coach claims that the team’s improved performance came from changing practice structure, not from recruiting better athletes. She explains that last season, practices ended with scrimmages that rewarded fast scorers; this season, the team switched to drills emphasizing decision-making under pressure. As evidence, she notes that in game film analysis, turnovers in the final five minutes fell from an average of 4.1 per game to 2.3, while overall scoring remained roughly constant. She also points out that the roster is nearly identical—only one new player logs significant minutes—making a talent explanation less likely. The coach concedes that opponents vary, but she claims the late-game turnover drop reflects a specific skill the new drills targeted. Her claim is that practice design directly shaped late-game execution.
The evidence supports the author’s claim by…
proving that opponents were weaker this season because fewer turnovers always mean the other team played poorly
showing a targeted improvement (late-game turnovers) that matches the new practice emphasis, while a mostly unchanged roster weakens the recruiting explanation
suggesting that scoring staying constant means practice changes had no effect on any aspect of performance
restating that turnovers fell from 4.1 to 2.3 in the final five minutes
Explanation
This question asks you to explain how evidence supports a claim about practice design improving performance. The coach presents evidence of a specific improvement—late-game turnovers dropping from 4.1 to 2.3—that directly matches the new practice emphasis on decision-making under pressure, while the roster remained mostly unchanged. This targeted improvement in exactly the skill area the new drills addressed, combined with the lack of new players, creates a strong logical connection between the practice change and the performance gain. Choice B correctly identifies how this pattern weakens alternative explanations and supports the practice design claim. Choice D fails by merely restating the statistics without explaining their connection to the practice changes. When analyzing evidence about interventions, look for outcomes that specifically match the intervention's intended effects.
Read the following embedded passage and answer the question.
A city council member argues that the downtown “street redesign” has improved public safety. She notes that in the six months after the redesign, police reports show a 22% drop in collisions at the three intersections where curb extensions and shorter crosswalks were installed, while collisions in the rest of downtown fell only 3%. She adds that emergency-room intake data show fewer pedestrian injury admissions on Friday and Saturday nights, the same periods when the redesigned blocks have the highest foot traffic. The council member concedes that the city also increased traffic enforcement during the same months, but she maintains that enforcement alone cannot explain why the largest improvements cluster around the redesigned intersections. Her claim is that the redesign itself—not merely stricter policing—made downtown meaningfully safer.
The author uses this evidence to suggest that…
collisions fell by 22% at three intersections and pedestrian injury admissions decreased on weekend nights
traffic enforcement is irrelevant to collision trends because police activity cannot influence driver behavior at intersections
the redesign caused all safety improvements citywide because any decline in collisions must come from street engineering changes
the redesign’s safety effect is most credible where the largest, location-specific declines align with the treated intersections and peak pedestrian use times
Explanation
This question tests your ability to explain how evidence supports a claim about the street redesign's safety impact. The council member presents two key pieces of evidence: a 22% drop in collisions specifically at the three redesigned intersections (versus only 3% elsewhere) and fewer pedestrian injuries during peak foot traffic times at those same locations. This location-specific and time-specific alignment between the evidence and the claim creates a strong logical connection—the safety improvements occur precisely where and when the redesign would most likely have an effect. Choice B correctly identifies this pattern of evidence clustering around the treated areas as the most credible support for the claim. Choice A overstates by claiming the redesign caused ALL improvements citywide, while the evidence shows the opposite pattern. The key strategy here is to look for evidence that shows specific alignment between the intervention (redesign) and the outcomes (safety improvements), rather than broad generalizations.
Read the following embedded passage and answer the question.
A public-health researcher claims that a city’s new network of protected bike lanes increased cycling by making riding feel safer, not merely by attracting existing cyclists to different routes. She cites automated counters showing that after installation, bike volume on three protected corridors rose by 41% while parallel streets without protection rose by only 6%. She also notes that a resident survey found a sharp increase in “interested but concerned” respondents who reported biking at least once a week, a category previously dominated by non-cyclists. The researcher acknowledges that gas prices rose during the same period, but she argues that a fuel-cost effect would likely influence all corridors similarly rather than concentrating growth on protected ones. Her claim is that perceived safety from protection was a key driver of new ridership.
The author uses this evidence to suggest that…
cycling increased mainly where protection was added and among previously hesitant residents, implying the lanes reduced perceived risk and drew new riders
gas prices had no effect on transportation choices because only infrastructure can change commuting behavior
bike volume rose by 41% on three protected corridors and by 6% on parallel streets
the protected lanes caused every street in the city to see identical cycling growth because safety improvements spread automatically
Explanation
This question tests your ability to explain how evidence supports a claim about protected bike lanes increasing cycling by improving perceived safety. The researcher provides evidence showing a 41% increase on protected corridors versus only 6% on unprotected parallel streets, plus survey data showing more "interested but concerned" residents now cycling weekly. This differential growth pattern—concentrated on protected routes rather than spread evenly—suggests the protection itself attracted new riders who previously felt unsafe. Choice B correctly explains how this evidence implies the lanes reduced perceived risk and drew new riders. Choice D merely restates the numbers without explaining their significance to the safety argument. The strategy here is to recognize how comparative evidence (protected vs. unprotected) can isolate the effect of a specific intervention.
A public health columnist argues that “the strongest predictor of whether people stick with exercise is not motivation, but convenience engineered into daily routines.” To support this claim, the columnist cites a university study of 600 commuters: when a company moved its bike storage from a basement room (requiring a keycard and elevator ride) to a ground-floor, glass-fronted area beside the main entrance, bike commuting among employees increased from 9% to 16% over four months. The study also reports that the company did not offer new fitness incentives, and that average employee self-reported “motivation to exercise” scores stayed statistically unchanged.
The author uses this evidence to suggest that bike commuting rose from 9% to 16% after bike storage became easier to access, even though motivation scores did not change in order to…
show that bike commuting increased only because employees received new financial incentives for fitness
repeat that bike storage moved to a glass-fronted area beside the main entrance
imply that reducing small logistical barriers can change behavior more reliably than trying to increase people’s stated desire to exercise
prove that motivation has no role in any health behavior and should never be measured in research
Explanation
This question assesses the skill of explaining how evidence supports a claim. The evidence that bike commuting rose from 9% to 16% after easier storage access, despite unchanged motivation scores and no new incentives, supports the columnist's claim by showing that convenience in routines drives behavior more than internal motivation. This logical link emphasizes how removing logistical barriers—like keycards and elevators—integrates exercise seamlessly into daily life, leading to sustained changes without relying on fluctuating desire. By controlling for incentives and measuring motivation stability, the evidence isolates convenience as the key factor in the increase. Choice B distracts by misinterpreting the evidence to dismiss motivation entirely, ignoring its potential role in other contexts not addressed here. A useful strategy is to examine how evidence controls for variables to pinpoint the claim's mechanism and avoid choices that absolutize findings.
In an essay on agriculture and water use, an environmental historian claims that “scarcity is often produced by policy choices that reward the wrong crops in the wrong places.” The essay describes a river basin where alfalfa and almonds—two water-intensive crops—expanded after a subsidy program tied payments to acreage planted rather than to water efficiency. Over ten years, irrigated acreage grew 19%, while the basin’s measured groundwater level fell an average of 11 feet. The historian adds that during the same decade, average rainfall was near the long-term mean, and the region’s population growth was modest.
The author uses the 19% expansion of irrigated acreage alongside an 11-foot average groundwater decline despite near-average rainfall to suggest that…
institutional incentives can drive water-intensive expansion that depletes groundwater even without an unusual drought, making scarcity a policy outcome
groundwater always declines over time in every region, so subsidies and crop choices do not matter
irrigated acreage grew 19% and groundwater levels fell an average of 11 feet over ten years
population growth is the sole cause of groundwater decline, since more people inevitably use more water
Explanation
This question assesses the skill of explaining how evidence supports a claim. The evidence of 19% irrigated acreage growth and 11-foot groundwater decline despite average rainfall supports the historian's claim by linking subsidies to water-intensive expansion, producing scarcity through policy. This tie illustrates how incentives tied to acreage, not efficiency, drive unsustainable choices in vulnerable areas. Modest population growth and normal rainfall isolate policy as the depletion cause. Choice B distracts by absolutizing decline everywhere, ignoring evidence that policy influences outcomes. A key strategy is to connect evidence to policy mechanisms and avoid choices that dismiss contextual factors.
Read the following embedded passage and answer the question.
A city council member argues that the new “Open Streets” program—closing three downtown blocks to cars on Saturdays—has strengthened local businesses more than it has inconvenienced drivers. She notes that during the first eight Saturdays, sales-tax receipts from those blocks rose 12% compared with the same period last year, while parking-garage entries within a half-mile fell 4%. She adds that the transit agency reported a 9% increase in weekend ridership on routes serving downtown, and that the police department recorded no increase in emergency response times in the area. Critics counter that some shoppers may simply be buying on Saturdays instead of other days, but the council member responds that the receipts are year-over-year, not week-to-week.
The author uses this evidence to suggest that…
sales-tax receipts from those blocks rose 12% compared with the same period last year
sales-tax receipts rose 12% compared with last year, meaning the receipts were higher than before
the program reduced parking demand so drastically that downtown drivers were effectively eliminated, which is why businesses improved
the program’s car restrictions likely increased commercial activity in the affected area rather than merely shifting it to a different day, supporting her claim that businesses benefited overall
all businesses citywide experienced the same increase in revenue, proving that the program caused a general economic boom
Explanation
This question asks you to explain how evidence supports a claim about the benefits of the Open Streets program. The evidence shows sales-tax receipts rose 12% compared to the same period last year, which directly supports the council member's claim that businesses have been strengthened. The year-over-year comparison is crucial because it addresses the critics' concern about sales merely shifting between days—if people were just buying on Saturdays instead of other days, the yearly comparison wouldn't show an increase. Choice B incorrectly overgeneralizes to all businesses citywide, while C makes an unsupported claim about eliminating drivers. When analyzing how evidence supports a claim, focus on the logical connection between what the data shows and what the author argues, paying attention to how the evidence addresses potential counterarguments.