HMVs (heavy motor vehicles) currently account for 8% of miles driven on Scrofulasia's roads but are involved in 16% of all highway fatalities. Huge HMVs - those with three trailers - had less than a third of the accident rate of single- and double-trailer HMVs. Clearly, therefore, one way for Scrofulasia to reduce highway deaths would be to require shippers to increase their use of triple-trailer HMVs.
Which of the following, if true, most seriously weakens the argument?
A. Very few fatal collisions involving HMVs in Scrofulasia are collisions between two HMVs.
B. In Scrofulasia, the safety record of the trucking industry as a whole has improved slightly over the past ten years.
C. Scrofulasian trucking companies have so far used triple-trailer HMVs on lightly traveled sections of major highways only.
D. In Scrofulasia, 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 HMVs
E. No matter what changes Scrofulasia makes in the regulation of trucking, it will have to keep some smaller roads off-limits to all HMV (heavy motor vehicles).
OA is [spoiler]D[/spoiler]
I could not understand, pl clarify
Which of the following, if true, most seriously weakens the argument?
A. Very few fatal collisions involving HMVs in Scrofulasia are collisions between two HMVs.
B. In Scrofulasia, the safety record of the trucking industry as a whole has improved slightly over the past ten years.
C. Scrofulasian trucking companies have so far used triple-trailer HMVs on lightly traveled sections of major highways only.
D. In Scrofulasia, 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 HMVs
E. No matter what changes Scrofulasia makes in the regulation of trucking, it will have to keep some smaller roads off-limits to all HMV (heavy motor vehicles).
OA is [spoiler]D[/spoiler]
I could not understand, pl clarify
