【求助】陈向东的一道CR

zyq645

Although compact cars make up only 38 percent of the vehicles in traffic, 48 percent of the cars that are followed too closely ("tailgated") are compact.  On the other hand, fewer than 27 percent of the cars tailgated are middle-sized, even though middle-sized cars make up 31 percent of the vehicles in traffic.

Which of the following, if true, most contributes to an explanation for the phenomenon described above?
(A) The shape of compact cars make it easy for a tailgater to see far enough ahead around such cars to minimize the chance of rear-end collision.
(B) Middle-sized cars, owned by families with children and pets, are likely to have bumper stickers that are interesting to read that tailgaters stay behind such cars longer.
(C) Compact cars sometimes have superior engines that allow them to pass middle-sized cars on the highway easily.
(D) The percentage of cars on the highway that are middlesized has been steadily decreasing over the past decades.
(E) Compact cars are often driven by fast drivers.

OA: A

没看懂题目里的discrepancy是什么，是说为什么CC(compact car)更说容易追尾吗？还是什么意思....