恩这里人多请教一道逻辑啦~谢谢

17. Psychologist: Some astrologers claim that our horoscopes completely determine our personalities, but this claim is false, I concede that identical twins---who are, of course, born at practically the same time---often do have similar personalities. However, birth records were examined to find two individuals who were born 40 years ago on the same day and at exactly the same time---one in a hospital in Toronto and one in a hospital in New York. Personalities of these two individuals are in fact different.

Which one of the following is an assumption on which the psychologist’s argument depends?

(A) Astrologers have not subjected their claims to rigorous experimentation.

(B) The personality differences between the two individuals cannot be explained by the cultural difference between Toronto and New York.

(C) The geographical difference between Toronto and New York did not result in the two individuals having different horoscopes.

(D) Complete birth records for the past 40 years were kept at both hospitals.

(E) Identical twins have identical genetic structures and usually have similar home environments.

这里的答案是C，可C为什么能作为假设呢

将C取非也没有weaken啊，而且individuals having different horoscopes根本和我们讨论的无关啊

请指教

up~up~

本题的conclusion是astrologers的说法是错的，reasoning是两个同一天不同地生的人性格不同，那么这里就有个GAP，两个人在同一天生不同地和HOROSCOPES有什么关系了？那么这里可以感觉到作者实际上就是把同一天不同地生等价为H同，C取非后就是反对了这种假设。

说得可能有点不清楚，见谅

恩有点明白了谢谢楼上哈~