PREP的逻辑一题，一直在两个选项中纠结，结果还是选错

wjk

Although exposure to asbestos is the primary cause of mesothelioma, a slow-developing cancer, researchers believe that infection by the SV40 virus is a contributing cause, since in the United States 60 percent of tissue samples from mesotheliomas, but none from healthy tissue, contain SV40.SV40 is a monkey virus; however, in 1960 some polio vaccine was contaminated with the virus.Researchers hypothesize that this vaccine was the source of the virus found in mesotheliomas decades later.

Which of the following, if true, most strongly supports the researchers' hypothesis?

(A) SV40 is widely used as a research tool in cancer laboratories.

(B) Changes in the technique of manufacturing the vaccine now prevent contamination with SV40.

(C) Recently discovered samples of the vaccine dating from 1960 still show traces of the virus.

(D) In a small percentage of cases of mesothelioma, there is no history of exposure to asbestos.

(E) In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.
答案：E
为什么C不正确呢，求指点啊，非常感谢！！！

塔罗牌

samples of the vaccine文章没有提到
 
文章说SV40有可能是这个病的主要原因 因为60%的有病的tissue samples都有SV40 （其实这些都是没用的话）
1960 一种疫苗被病毒传染
所以科学家觉得这个病就是由这个疫苗传出来的
(E) In Finland, where the polio vaccine was never contaminated, samples from mesotheliomas do not contain SV40.
说在芬兰 这个疫苗没被传染过 所以他的samples就没有SV40
这就说明被传染的疫苗真是这个病的罪魁祸首

Alexandraross

論證：小兒痲痹的育苗是導致後來發生這個SV40 virus的原因。
A. 無關
B. Weaken
C. 其實是在支持這個結論。就是那個vaccine導致的。。。。。。
D.無關
E.那些沒有受感染的地方，結果就沒有出現這個病毒。

demorgan

C说的是现象，就是已经存在的事实，所以不必加强。这道题的结论是this vaccine was the source of the virus found in mesotheliomas decades later，要加强的是这句话关键词是source，E的加强是典型的无原因无结果，简单地说就是只有这个原因导致这个结果。不知道这样解释可以吗

wjk

可是我搞不清楚了，是不是加强的选项都是要题目中出现过的内容？如果说C中没有出现sample的话，那E选项中也没有题目中sample这个词 怎么回事啊 真的不懂了 请指点 谢谢

wjk

那这样的话，不是C也可以的吗？题目问的是支持选项

wjk

看懂点你的解释了，想问一下怎么判断一个东西是不是事实，不用加强呢？