【GMAT考满分逻辑CR题库】Polar bears depend on sea ice, which melts duri_真题_答案

题目内容

Polar bears depend on sea ice, which melts during exceptionally warm weather, for access to food. When warm weather lasts longer than normal, polar bears accumulate fat—energy stored for their long winter hibernation—more slowly and weigh less, on average, as a result. At the same time, during periods of prolonged cold, polar bears weigh significantly less than they usually do, on average.

Which of the following, if true, does most to explain the contrast described above?

A
During periods of prolonged warmth, polar bears have to compete with a wider variety of species for the same food sources.
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B
The less sea ice there is, the harder it is for polar bears to access their food sources.
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C
When weather is very warm, polar bears become lethargic and unable to chase after prey.
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D
During periods of prolonged cold weather, polar bears hibernate for longer and consume more of their reserves of stored fat.
分析该选项
E
The sea ice produced by long periods of cold weather provides shelter for marine life, increasing the populations of species that polar bears prey upon.
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正确答案: D

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