请教狒狒23题

23. On a certain day, nine scheduled flights on Swift Airlines were canceled. Ordinarily, a cancellation is due to mechanical problems with the airplane scheduled for a certain flight. However, since it is unlikely that Swift would have the mechanical problems with more than one or two scheduled flights on a single day, some of the nine cancellations were probably due to something else.

The argument depends on which one of the following assumptions?

(A) More than one or two airplanes were scheduled for the nine canceled flights.

(B) Swift Airlines has fewer mechanical problems than do other airlines of the same size.

(C) Each of the canceled flights would have been longer than the average flight on Swift Airlines.

(D) Swift Airlines had never before canceled more than one or two scheduled flights on a single day.

(E) All of the airplanes scheduled for the canceled flights are based at the same airport.

答案是A  有点不是很明白题意 一次FLIGHT就一架飞机吗？ 还什么？并请解释下怎么理解这题（最好用中文回答）

前提（事实）1： 某天9次航班被取消了。

前提（事实）2： 航班的取消是因为飞机的机械故障

逻辑推理：  在同一天有多次航班遇到机械故障 ------ 〉  肯定有其他原因致使9次航班都被取消。

瑕疵：  多次航班 不等同于 多架飞机。如果这多次航班都用一架飞机，那么上述推理就不成立了。

Plus: 感觉这道题目单从原文不容易看出逻辑瑕疵，因为航班和飞机的概念可能在我们印象中不深。但是Assumption题目用取非法就一目了然了。把A取非，所有的航班都是集中在一两架飞机，那么同一天取消了9次航班的原因就没有别的了，都是机械故障。致使原文推理不成立。：）