求助大全LSAT 逻辑的一道数学题t1-S4-25题

hlz8601

25.  All of the best comedians have had unhappy childhoods. Yet, many people who have had happy childhoods are good comedians, and some good comedians who have had miserably unhappy childhoods are happy adults.

If the statements in the passage are true, which one of the following CANNOT be true?

(A) The proportion of good comedians who had unhappy childhoods is greater than the proportion of the best comedians who did.

(B) Some good comedians have had unhappy childhoods and are unhappy adults.

(C) Most of the best comedians are happy adults.

(D) More good comedians have had unhappy childhoods than have had happy childhoods.（A）

(E) The proportion of comedians who are happy adults is higher than the proportion who are unhappy adults.

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大全给的答案是A   麻烦前辈帮忙看一下，讲解一下推理过程。