求大神赐教

How do the airlines expect to prevent commercial planecrashes? Studies have shown that pilot error contributes to two-thirds of allsuch crashes. To address this problem, the airline have upgraded their trainingprograms by increasing the hours of classroom instruction and emphasizingcommunication skills in the cockpit. But it is unrealistic to expect suchmeasures to compensate for pilots’ lack of actual flying time. Therefore, theairlines should rethink their training approach to reducing commercial crashes.

Which one of the following is an assumption upon which theargument depends?

A.     Trainingprograms can eliminate pilot errors.

B.     Commercialpilot routinely undergo additional training throughout their careers.

C.     The numberof airline crashes will decrease if pilot training programs focus on increasingactual flying time.

D.     Lack ofactual flying time is an important contributor to pilot error in commercialplane crashes.

E.     Communicationskills are not important to pilot training programs.