Question ID:PT64 S3 Q8 Passage:A recent study shows that those highways that carry the most traffic, and thus tend to be the most congested, have the lowest rate of fatal traffic accidents. Stem:Which one of the following, if true, most helps to explain the phenomenon described above? Correct Answer Choice:DChoice A:Drivers have more accidents when they become distracted. Choice B:The highways that have the highest rate of fatal accidents have moderate volumes of traffic. Choice C:Most of the motorists on very heavily traveled highways tend to be commuting to or from work. Choice D:Most serious accidents occur when vehicles are moving at a high rate of speed. Choice E:Heavily traveled highways do not always carry a higher proportion of large trucks.