7. 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.（B）

(E) Studies by government regulations show that the number of airplane flight miles remains relatively constant from month to month.

请NN解释一下为什么选B，完全没有概念的说！

P.S. 逻辑区的斑竹们：请问这里有没有大全里的GMAT部分的逻辑讨论汇总啊？谢谢！