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Although compact cars make up only 38 percent of the vehicles in traffic, 48 percent of the cars that are followd 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 the traffic.

which of the following, if true, most contributes to an explanation for the phonomenon described above?

书上写的正确答案为：the shape of compact cars makes it easy for a tailgater to see far enough ahead around such cars to minimize the chances of a rear-end collision.

怎么算也是compact cars 追尾机率大于middle sized car, 怎么说是minimize the chances of a collision呢？