这道题到底选什么？

onlyuhaibo

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

f430spider

应该是c吧