这道题答案为什么不是E？

fuzhouguy

A study comparing a group of chronically depressed individuals with an otherwise matched group of individuals free from depression found significantly more disorders of the immune system among the depressed group. According to the researchers, these results strongly support the hypothesis that mental states influence the body's vulnerability to infection.

which of the following, if true, casts the most serious doubt on the researchers' interpretation of their findings?

c. Disorders of the immune system cause many of those individuals who have them to become chronically depressed.

e. A high frequency of infections can stem from an unusually high level of exposure rather than from any disorder of the immune system.

correct choic:c

fuzhouguy

自己顶一下。

有谁给个解释，帮我拉出浑水，谢谢先。

focusspeed

E明明是加强不是削弱。

结论是：these results strongly support the hypothesis that mental states influence the body's vulnerability to infection.

E： 高感染除了来自低免疫系统也来自高曝光率。(原文讲的是精神问题与免疫问题的关系，e只讲到了免疫系统都没有讲到精神问题，也可说无关）

fuzhouguy

我觉得e 是削弱结论啊。e给出了他因来削弱结论。结论是mental states 影响 vulnerability to infection, E 说 high level of exposure 影响 infection, 这不是给出他因削弱结论吗？

而C并没有关注结论，跟infection无关啊。

我还是想不通为什么C对。

请再指教。

fuzhouguy

怎么回事？竖着排列了？