Dr. Theresa Pagano, a biologist, has found that the checkerspot butterfly is becoming more prevalent in regions farther north than before and less prevalent in regions farther south. The northward shift of the butterflies is almost perfectly correlated with the northward shift of the warm zones in the global climate, climate is responsible for the northward movement of the butterflies.
What this question is testing
Your task
Find the choice that makes the argument's conclusion more likely to be true.
Common trap
Answers that are consistent with the argument but add no real support, or that strengthen a claim the argument doesn't make.
Winning move
Locate the gap between evidence and conclusion, then pick the choice that closes it.
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