请教两道语法题，谢谢

18.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

表示以什么速度固定搭配at speed，E选项也足够清楚，在E的比较结构中比较的对象一致故省去speeds而且比较直接跟在speeds之后。答案未知，应该是E吧？

38. (Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less,) get better gas mileage, allow passengers to get in and out more easily, and have a smoother ride.

A.      Minivans carry as many as seven passengers and, compared with most sport utility vehicles, cost less,

B.       Minivans, which carry as many as seven passengers, compared with most sport utility vehicles, they cost less,

C.      Minivans carry as many as seven passengers, in comparison with most sport utility vehicles, and have a lower cost, they

D.      Minivans, carrying as many as seven passengers, compared with most sport utility vehicles, cost less,

E.       Minivans, which carry as many as seven passengers, compared with most sport utility vehicles the cost is lower, and they

这道题答案是什么？我觉得是A