蓝皮书上道题N312

N312。 Instead of blaming an airline accident on pilot error, investigators should find out why the error was made by analyzing airplane design, airline management, and pilot-training programs. For only then can changes be made to ensure that the same type of error does not recur and cause another accident.

Which of the following is a presupposition of the argument above?

A Pilot error is not a contributing factor in most airline accident.

B Airline companies themselves should be the agents who investigate airline accidents.

C Stricter government regulation of airline companies will make air travel significantly safer.

D Investigators of airline accidents should contribute to the prevention of future accidents.

E Most pilots who make errors in flying will repeat their errors unless they are retrained.

答案是D.我也知道从推理链来说，找出Gap的话就是D。但是为什么A不对呢……我没有找到一个理由说服自己A不对。。。