大全I-7.谢谢大家了~

Whenever a major airplane accident occurs, there is a dramatic increase in the number of airplane mishaps reported, a phenomenon that may last for as long as a few months after the accident. Airline officials assert that the publicity given the gruesomeness of major airplane accidents focuses media attention on the airline industry and the increase in the number of reported accidents is caused by an increase in the number of news sources covering airline accident, not by an increase in the number of accidents.
Which of the following, if true, would seriously weaken the assertions of the airline officials?
(A) The publicity surrounding airline accidents is largely limited to the country in which the crash occurred.
(B) Airline accidents tend to occur far more often during certain peak travel months.
(C) News organizations do not have any guidelines to help them decide how severe or how close an accident must be for it to receive coverage.
(D) Airplane accidents receive coverage by news sources only when the news sources find it advantageous to do so.
(E) Studies by government regulations show that the number of airplane flight miles remains relatively constant from month to month.
正确答案选B
我想知道为什么A不行？
题说：一旦有空难发生，媒体就玩儿命报道，所以，空难的增加是由媒体的大肆渲染而成，不是由于事故增多。
A想说空难报道是有受限要求的。--不是很好的削弱了题目的证据有效性构成了weaken么？