请问语法大全里的一题！！谢谢各位帮忙指点！

各位G友们：

麻烦帮忙分析一道下面的题目：

8.     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

我选的是D,但是答案是C！我们不是有个原则说：N+that+be+adj不是应该转换成adj+N吗？还是这题有更加严重的错误？

谢谢！！

顶！

d的意思变成small cars的多少了。