pp3-cr-96
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. 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.
B. So far only the best, most experienced drivers for Partorian trucking
companies have been driving triple-trailer 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.
想請問正解 B
題目的因果: 增加triple-trailer trucks----highway deaths下降
其他選項我都可以排除
可是B是哪裡反駁
請大大幫忙一下
謝
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