another question about SC

justforuUID: 2238767

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