another question about SC

guoguo463

Some psychiaric studies indicate that aomng distinguished attists the rates of teh manic depression and major depression are ten to thirteen times as prevalent as 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) manic depression and major depression are ten to thirteen tiems more prevalent than in

The key is E.

Why not choose A or B. please explain it for me. THanks

Cantaloupe

1. ..times more than...故，A,C,D错。

2. 句意是说，这种病更流行，所以不用提rates了。如果是B的话，应该是the rates are ...higher than...要用higher,不能用more.

guoguo463

thanks