17. A conservation group in the United States is trying to change the long-standing image of bats as frightening creatures. The group contends that bats are feared and persecuted solely because they are shy animals that are active only at night.

Which of the following, if true, would cast the most serious doubt on the accuracy of the group's contention?

(A) Bats are steadily losing natural roosting places such as caves and hollow trees and are thus turning to more developed areas for roosting.

(8) Bats are the chief consumers of nocturnal insects and thus can help make their hunting territory more pleasant for humans.

(C)         Bats are regarded as frightening creatures not only in the United States but also in Europe, Africa, and South America.

(D)         Raccoons and owls are shy and active only at night, yet they are not generally feared and persecuted.

(E)         People know more about the behavior of other greatly feared animal species, such as lions, alligators, and snakes, than they do about the behavior of bats.

答案d,

我选了b,为什么不对啊，原文说应为bats是shy,night动物
所以bats被fear,and persecuted

我觉得削弱就说bats不应该被害怕，所以b选项说bat帮助人类，所以不应该被迫害。
这样推理有问题么？

d我知道是同因异果削弱，可是b我就不知道那推理有问题了~

谢谢大家指教~

要分清楚 evidence 和 conclusion 

本题目的bats are feared and persecuted solely 是一个evidence 也是就是一个逻辑前提。

conclusion是 they are shy animals that are active only at night. 是结论。

B选项你觉得bats对人类有帮助所以不应该fear，这是在反对前提。错。

分析：要怀疑论点，论点是：bats are feared and persecuted solely because they are shy animals that are active only at night
唯一的原因是它们害羞、夜间活动，因此只要推翻害羞、夜间活动是人们害怕的原因，就可以推翻该论点。

(B) Bats are the chief consumers of nocturnal insects and thus can help make their hunting territory more pleasant for humans. 蝙蝠消灭夜虫，不在论点讨论范围，与唯一的害怕原因无关