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题目材料：

Which of the following is an assumption relied on in the commentator's argument?

A.There is no reason other than air pollution for wanting to reduce the number of automobiles using Seraland's roads.
B.It will be impossible for authorities in Seraland to enforce a law that requires all vehicles on the road to emit no pollutants.
C.Encouraging the use of zero-emission vehicles is likely to have some measurable effect on air pollution in fewer than twenty years.
D.When zero-emission vehicles are the only kind of vehicle permitted, people will want to drive as much as they currently do.
E.The type of battery required by a zero-emission vehicle can be produced without emitting significant amounts of pollutants into the air.

A显示答案

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以上解析由考满分老师提供。