关于GMAT和PREP的语法题

26. The electronics company has unveiled what it claims to be the world’s smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs less than 11 ounces.

A.      to be the world’s smallest network digital camcorder, the length of which is that of a handheld computer, and it weighs

B.      to be the smallest network digital camcorder in the world, which is as long as a handheld computer, weighing

C.      is the smallest network digital camcorder in the world, which is as long as a handheld computer, and it weighs

D.     is the world’s smallest network digital camcorder, which is as long as a handheld computer and weighs

E.      is the world’s smallest network digital camcorder, the length of which is that of a handheld computer, weighing

31. A recent review of pay scales indicates that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times in 1980.

1. that CEO’s now earn an average of 419 times more pay than blue-collar workers, compared to a ratio of 42 times

2. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, a ratio that compares to 42 times

3. that, on average, CEO’s now earn 419 times the pay of blue-collar workers, as compared to 42 times their pay, the ratio

4. CEO’s who now earn on average 419 times more pay than blue-collar workers, as compared to 42 times their pay, the ratio

5. CEO’s now earning an average of 419 times the pay of blue-collar workers, compared to the ratio of 42 times

这两题的答案和GWD不一样啊,GWD是B和B, prepGMAT中是D,C. 到底谁对呀