还是比较级出错……求助～～～求助～～

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

我不是NN，提供点意见供参考：

补齐原句就应该是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 (the telephone lines are) currently possible. 或者higher than (those are) currently possible.

所以选项里面有that的，那是主谓不一致

嗯，that指代speeds错。