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1.        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

我想问以下the rate 的用法:

1)the rate 应和the rate比较

2)修饰the rate 的形容词应能修饰数字.故A,B,C中根据the rate的用法第一条就可排除.

请问我上面的解释对不对