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)
E. at speeds much higher than are
answer：E
我不明白为什么than后面要补出are呢？much前面的是名词speeds那than后面补也应该是个名词吗？ | 
