Calhoun stabilized the rat population ______. Which of the following inferences CANNOT be made from the information in paragrap

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问题 Calhoun stabilized the rat population ______.
Which of the following inferences CANNOT be made from the information in paragraph one?

选项 A、Calhoun’s experiment is still considered important today.
B、Overpopulation causes pathological behavior in rat populations.
C、Stress does not occur in rat communities unless there is overcrowding.
D、Calhoun had experimented with rats before.

答案A

解析 本题考查通过文章内容作推断的能力。其他三个选项均可在第一段中找到相应的叙述文字,而答案项丝毫未曾提及。
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