[問題]Fei Fei, Q23

[meimie]

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.

参考答案：A 採用取非法。
思路：否定More than one or two airplanes were scheduled for the nine canceled flights.將削弱作者的結論。


我看不懂他的解釋耶, 為什麼否定A會削弱作者的結論?

[Calvin]

如果先想一架飛機可能可以處理同一天一個以上的flights，那meimie不知就是否比較可以了解A了！

有問題，歡迎繼續討論

[winihsi]

如果要削弱作者的結論
關鍵是不是應該是undermine or weaken諸如此類的嗎?
可是這題不是在找 on which assupmtion does the author's conclusion base?