In 1960, 10 percent of every dollar paid in automobile insurance premiums went to pay costs arising from injuries incurred in car accidents. In 1990, 50 percent of every dollar paid in automobile insurance premiums went toward such costs, despite the fact that cars were much safer in 1990 than in 1960.

Which of the following, if true, best explains the discrepancy outlined above?

(A) There were fewer accidents in 1990 than in 1960.

(B) On average, people drove more slowly in 1990 than in 1960.

(C) Cars grew increasingly more expensive to repair over the period in question.

(D) The price of insurance increased more rapidly than the rate of inflation between 1960 and 1990.

(E) Health-care costs rose sharply between 1960 and 1990.

这道题的答案是E。我想请问大家，这个E怎么得出来的？
另外C为什么不对？

谢谢！

人受伤了，就要花钱，虽然车安全了也就是发生事故数少了，但是每个人受伤的花费要高很多，所以最后总花费还是变高，就是E