请教一道即非OG又非GWD and Tian shan 的语法题

According to analysts, an alliance between three major personal computer companies and most of the nation's largest local telephone compnaies 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 speeds than are

Ans: e

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An alliance would enable customers to receive Internet data over phone lines at speeds much higher than are currently possible.

I think your Choice E, the 2nd "speed" is redundant.

1. at speeds, not with speeds, eliminate choice A, B

2. at higher speeds THAN, not AS, elinimate C

3. the reference of "that" is unclear. If it refers to "speeds", it should be "those". eliminate D.

4. E is the best if you change it to "at speeds much higher than are".

e 應該是at speeds much higher than are  

這樣就可以解決你的問題了