11.   Some psychiatric studies indicate that among distinguished artists the rates of manic depression and major depression are ten to thirteen times as prevalent as in the population at large.

(A) the rates of manic depression and major depression are ten to thirteen times as prevalent as in

(B) the rates of manic depression and major depression are ten to thirteen times more prevalent than in

(C) the rates of manic depression and major depression are ten to thirteen times more prevalent when compared to

(D) manic depression and major depression are ten to thirteen times as prevalent when compared to（E）

(E) manic depression and major depression are ten to thirteen times more prevalent than in

I choose B, but the answer is E. Is the answer right?

Oh...seems I know why. It is because the word "prevalent".

The "depression" can be prevalent, but the "rates" cannot be prevalent.

主要是。。。意思是，除了那个，另外一个错误更容易看出来。

前提是在句子正确的情况下.而E显然没什么错误。如果你看不出B的错误，是不是就该选

E了？

这是我那句话要表达的意思。