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求教prep上的一道逻辑题

Which of the following most logically completes the passage?
On the whole, scientists do their most creative work before age forty, a tendency that has been taken to show that aging carries with it a loss of creative capacity.  An alternative explanation is that by age forty most scientists have worked in their field for fifteen or more years and that by then they have exhausted the opportunity for creative work in that field.  Supporting this explanation is the finding that __________.
A. the average age of recipients of scientific research grants is significantly greater than forty
B. a disproportionately large number of the scientists who produce highly creative work beyond age forty entered their field at an older age than is common
C. many scientists temper their own expectations of what they can achieve in their research work by their belief that their creativity will decline as they age
D. scientists who are older than forty tend to find more satisfaction in other activities, such as teaching and mentoring, than they do in pursuing their own research
E. there is a similar diminution of creativity with age in nonscientific fields, such as poetry and musical composition


这道题答案是B。但是我始终不太理解,总觉得B是weaken这个assumption的。有NN知道为何选B吗?求解!
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B很好理解。科学家大部分有创意的工作都是在40之前完成,所以一般认为老了就没创意了。另一个解释是他们不是因为老了没创意,而是因为他们在这行混太久了才没创意的。

B选项支持了这个说法。因为B指出所有40之后还能拿出创意的科学家进入这行也比较晚,也就是说:他们在新加入的行当里面混的时间短,尽管他们老了,但他们在新进入的行当里仍然拿出了创意。是不是就是题干中第2个说法的支持?

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高手啊,我还是有些疑惑。它说:不是因为老了没创意,而是因为混太久没创意。然后B答案里说,他们是新加入这个行业,这个不就跟题干“因为混太久才没创意”而矛盾吗?

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LS的TX··不妨把原文的逻辑链搞出来

原文开始说
观点1:科学家们在40岁之前做好多创意,40之后就没创意了。
观点2:不是老了没创意,而是混太久没创意。

要补全的句子应该是支持“不是老了没创意而是混太久没创意”的:,也就是观点2.

B说有很多做出创意成果的科学家是40之后才加入这个领域的。  

Bweaken了观点一的40之后没创意,而且观点2和观点1是相反的·所以B就是支持了观点2了····所以就逻辑上补全了····

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THX!!!

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