why E?

why not D? what "are" stand for?

1. GWD21-Q1:

According to analysts, an alliance between three major personal computer companies and most of the nation’s largest local telephone companies would enable customers to receive internet data over regular telephone lines with speeds much higher than is currently possible.

A.      with speeds much higher than is

B.       with speeds that are much higher than are

C.      at much higher speeds as are

D.      at much higher speeds than that

E.       at speeds much higher than are

E、are后面省略了比较对象speeds

若是看不出这个，语意上，应该知道是两种speed的比较。而D选项，speeds和that不一致，也应该排除。