By citing prudent investors’ idea, the author wants to illustrate that From the last two paragraphs, we know that

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问题 By citing prudent investors’ idea, the author wants to illustrate that
From the last two paragraphs, we know that

选项 A、if each individual counts, one-third of wolves have to be vaccinated.
B、Dr. Haydon proved epidemiologists’ standard assumption is right.
C、to vaccinate 10% to 25% of wolves living in the connected meadows is enough.
D、it takes 20 years to reduce risk of extinction if all the wolves are targeted.

答案C

解析 推理判断题。最后两段主要介绍了流行病学家的设想和Dr. Haydon的研究,他们的观点正好相反,首先排除B,选项A在第五段第一、二句提及,文中说的是三分之二需要注射疫苗而不是三分之一;选项D是对最后一段第一句的断章取义;选项C则是对第五段最后一句的正确理解,故选C。
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