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Passage Comparison Practice Test

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Q1

Passage A:

Because gene drives bias inheritance to spread engineered traits through wild populations, their release raises a form of ecological irreversibility ill-suited to trial-and-error policy. Once a drive escapes confinement, eradication of the construct may be technically or politically impossible, and effects can ripple across food webs and borders. The precautionary principle therefore counsels restraint: absent broad, cross-border consent and robust, independently verified reversal mechanisms, field deployment should not proceed. Laboratory studies and modeling can inform our understanding, but uncertainty about non-target effects and governance gaps mean we owe future generations a margin of safety. A moratorium on environmental releases, with narrowly defined emergency exemptions, is the prudent default until oversight catches up with capability.

Passage B:

Uncertainty is not a reason to wait until certainty arrives. For vector-borne diseases imposing ongoing harm, adaptive management—small-scale, closely monitored field trials with pre-specified exit ramps—offers a way to learn safely. Confinement strategies, threshold-dependent drives, and reversal constructs reduce the risk of runaway spread, and liability regimes can align incentives for caution. Overly precautionary bans privilege the status quo without comparing its costs to the risks of controlled experimentation. The path forward is not laissez-faire but staged deployment under transparent governance that iterates in light of evidence.

Which one of the following best describes the relationship between Passage A and Passage B?

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