有一道Explain题需要各位帮忙，谢谢！

chejw

In the two years following the unification of Germany in 1989, the number of cars owned by residents of East Germany and the total distance traveled by cars in East Germany both increased by about 40 percent.  In those two years, however, the number of East German residents killed each year as car occupants in traffic accidents increased by about 300 percent.

 

Which of the following, if true, most helps to explain the disproportionate increase in traffic fatalities?

 

(A) The average number of passengers per car was higher in the years before unification than it was in the two years after.

(B) After unification, many people who had been living in East Germany relocated to West Germany.

(C) After unification, a smaller proportion of the cars being purchased by East German residents were used vehicles.

(D) Drivers who had driven little or not at all before 1989 accounted for much of the increase in the total distance traveled by cars.

(E) Over the same two-year period in East Germany, other road users, such as motorcyclists, bicyclists, and pedestrians, experienced only small increases in traffic fatalities.

 

我选了A.

因为原文说虽然车主和总里程数只上升了40%，然而事故死亡人数就上升了300%。因此我推测是每辆汽车所载的人数多了。选了A

但正确答案是D.我又重看了一次原文的结论，说是car ocuupants的死亡人数涨了，意思是说车主吗？即使是车主，但D里只说是那些1989年之前很少开车的人导致1989后的里程数上涨，但这也说明不了为什么死亡人数涨300%，但车主，总里程只升40%这一矛盾。因为D里也没有说那些1989年前很少开车的人是否有车。

有哪位可以解答我的疑问呢？谢谢了！！！