Humans Role in Global Warming Practice Test

Students examine three aligned records from 1960–2020: human activity (CO$_2$ emissions increase strongly), a climate indicator (global sea level rises), and another climate indicator (Arctic summer sea ice extent decreases). All three trends become more pronounced after about 1980. Which claim about humans’ role is supported by synthesizing these multiple lines of evidence?

A class examines records from 1880–2020. Human-activity evidence: global fossil-fuel CO$_2$ emissions increase strongly after about 1950. Climate indicators: global average temperature anomaly rises overall, and global mean sea level increases over the same time period. The biggest long-term increases in all three records occur after about 1950. Which explanation best fits all of this evidence while staying within what the data can support?