77. How do the airlines expect to prevent commercial plane crashes? Studies have shown that pilot error contributes to two-thirds of all such crashes. To address this problem, the airline have upgraded their training programs by increasing the hours of classroom instruction and emphasizing communication skills in the cockpit. But it is unrealistic to expect such measures to compensate for pilots’ lack of actual flying time. Therefore, the airlines should rethink their training approach to reducing commercial crashes.
Which one of the following is an assumption upon which the argument depends?
A. Training programs can eliminate pilot errors.
B. Commercial pilot routinely undergo additional training throughout their careers.
C. The number of airline crashes will decrease if pilot training programs focus on increasing actual flying time.
D. Lack of actual flying time is an important contributor to pilot error in commercial plane crashes.
E. Communication skills are not important to pilot training programs.
请问C,D有什么不同吗？我认为都好像啊！答案是D,可是C 和D 都没有本质的区别，有吗？
这道题的意思，如何阻止商业飞机的事故，研究显示飞行员错误占了三分之二，因此为了解决这个问题，增加训练………………，但这样的措施不能补偿飞行员实际飞行时间……，因此要重新考虑……，
推理过程是：增加训练时间……可以阻止飞行事故，但不能弥补实际飞行时间………，因此是D是正确答案，C的数字文中没有提到，属于无关项。
请指教。
C的数字文中没有提到，属于无关项。
谢谢，是因为这个吗？
题目中的two-thirds是不是和数字有关呢？
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