疑惑啊!!!请问为何

Today's technology allows manufacturers to make small cars more fuel-efficient now than at any
time in their production history.    

(A) small cars more fuel-efficient now than at any time in their
(B) small cars that are more fuel-efficient than they were at any time in their
(C) small cars that are more fuel-efficient than those at any other time in
(D) more fuel-efficient small cars than those at any other time in their
(E) more fuel-efficient small cars now than at any time in
A为啥没c好呢...可不可以理解small cars more fuel-efficient now than (small cars)at any time in their

比较时间不符合语法习惯，而且today跟now重复

必须得有other 这是本题的一个考点 很常见的考点

比如：MM比班里的所有女生都漂亮

    是你和班里的除了你以外的女生（不包含你自己）比，

other排除了today

是today的cars和历史上(不包括today的cars）比较  要排除自己

这道题答案是什么呀？

small cars that are（省略吧？） more fuel-efficient than those at any other time in也不对吧？