GWD-28-Q17 答案是什么呢?急!

jackandlisa

GWD-28-Q17
                    

In the nation of Partoria, large trucks currently account for 6 percent of miles driven on Partoria’s roads but are involved in 12 percent of all highway fatalities. The very largest trucks – those with three trailers – had less than a third of the accident rate of single- and double-trailer trucks. Clearly, therefore, one way for Partoria to reduce highway deaths would be to require shippers to increase their use of triple-trailer trucks.

Which of the following, if true, most seriously weakens the argument?

A: Partorian trucking companies have so far used triple-trailer trucks on lightly traveled sections of major highways only.

B: No matter what changes Partoria makes in the regulation of trucking, it will have to keep some smaller roads off-limits to all large trucks.

C: Very few fatal collisions involving trucks in Partoria are collisions between two trucks.

D: In Partoria, the safety record of the trucking industry as a whole has improved slightly over the past ten years.

E: In Partoria, the maximum legal payload of a triple-trailer truck is less than three times the maximum legal payload of the largest of the single-trailer trucks

jandjshi

A. The reason that triple-trailer trucks have lower accident rate is not that they are safer, but that they only travel on less congested roads.

jackandlisa

thank you!!

nymph

Yes, I also think it is A.

The purpose is to reduce highway death. While they are used on lightly travelled sections of major highway only, the plan can not reduce highway death.

imjiaying

GWD的逻辑怎么那么绕...哎

Raymond_GMAT

triple-trailer trucks 的事故率低是因为，它on lightly traveled sections of major highways only。

这里也是有假设的，跑在lightly traveled sections of major highways 的汽车的事故率低比跑在其它地方的同样的汽车的事故率低。

啊，我怎么感觉GWD的题目都需要用常识来解啊？真的是这样么，谁来救救我啊