这题我觉得d也对啊（答案选a），很纠结！！！请各位帮忙看看

harvard2012

Traffic safety experts predict that the installation of newly designed air bags in all cars in the United States would reduce the average number of fatalities per traffic accident by 30 percent. In order to save lives, the Department of Transportation (DOT) is considering requiring automobile manufacturers to install air bags of this design in all cars produced after 1998.
Which of the following, if true, represents the strongest challenge to the DOT’s proposal?
(A) Air bags of the new design are more given to being inadvertently triggered, an occurrence that can sometimes result in fatal traffic accidents.
(B) The DOT is planning to require automobile manufacturers to produce these air bags according to very strict specifications.
(C) After installing air bags in new cars, automobile manufacturers will experience an increase in sales.
(D) The proposed air bag installation program will adversely affect the resale of cars manufactured prior to 1998.
(E) As production costs increase, the profits of many domestic automobile dealers show a marked decrease

chendan815

其它四项讲的都跟题干的目的（救人）无关，讲的都是钱的事。