[求助]OG11-92请教

Which of the following is an assumption on which the highway commissioner's claim depends?

(A)         The amount of money required annually for road repairs will not increase from its current level.

(B)         The total number of trips made on the toll highway per year will not decrease from its current level.

(C)        The average length of a trip made on the toll highway will not decrease from its current level.

(D)        The number of drivers who consistently avoid the highway tolls by using secondary roads will not increase from its current level.

(E)         The total distance traveled by vehicles on the toll highway per year will not decrease from its current level. Argument Construction

答案是E。请教：选项A和D为什么不能作为assumption呢。

The highway commissioner claims that the toll increase will increase the annual revenue generated by the toll highway by at least 50 percent per year. 选项e直接证明了这句话：涨价不会减少收费公路的行驶里程，也就是说通过涨价50%能够达到finance50%资金的目的。

答案A ：题干中没有提到有关the amount of money required 的问题，所以排除。

答案d：使用第二条公路的驾驶员数量不增加，也并不意味着使用收费公路的驾驶员数量会不变，两者没有因果关系。

这道assumption题一看大部分是not选项,  就应该想到not weaken就是排除他因削弱的可能性，现在很多题都这样