答案解析
Prep2012-Pack1-CR-011 VCR005442 Easy
Reasoning
There has been, over a period of five years, a pattern of unusualy large stock purchases one day before the stock analyst's magazine column recommending them appears on the newsstands. Of the five answer options given, which one would NOT help explain this pattern? Anything suggesting how people who buy stocks could see the column or discover the information in it at least a day before it appears on the newsstands would help explain the pattern.
Therefore look for the answer option that does not suggest how this could happen.
A. The workers’ purchases based on their advance knowledge could account for the pattern.
B. The stockbrokers' purchases based on their advance knowledge could account for the pattern.
C. Purchases by publishing company employees and others with whom they shared the information could account for the pattern.
D. Correct. This answer option does not indicate how anyone other than the analyst could find out about the recommendations in advance. Therefore, it would not help explain the pattern.
E. Purchases by these twenty people and others with whom they shared the information could account for the pattern.
The correct answer is D.
Prep2012-Pack1-CR-012 VCR005853 Easy
Reasoning
What could explain why the number of fatalities per highway mile driven declined even as average highway speeds
increased? We are told that higher speeds mean a higher risk of fatalities, other things being equal. Consequently, the increasing highway speeds between 1995 and 2000 should have led to more fatalities per highway mile driven.
Since the fatalities per mile driven actually decreased, some countervailing factor must have increased driving safety more than enough to compensate for the danger of the higher speeds. Thus, find an answer option suggesting how a factor that increased driving safety became more common or effective between 1995 and 2000.
A. More passengers per car would likely mean even more fatalities per highway mile driven, since more people would die per car accident.
B. Correct. More seatbelts and airbags would have probably reduced the average number of fatalities per car accident, resulting in fewer fatalities per mile driven even if the higher speeds resulted in more car accidents.
C. This cannot help explain the decrease in fatalities. Driving at a higher speed probably increases the risk of a fatal car accident regardless of whether the speed is legal or illegal.
D. Fewer accidents per highway mile driven could explain why the average highway mileage per car increased (since some cars would have gone more miles before crashing), but the converse is not correct: the increased average mileage could not explain why there were fewer accidents per mile driven.
E. Instead of explaining why there was a decrease in the number of fatalities per highway mile driven, this merely rules out the possibility that the explanation was a lower density of cars on the highways.
The correct answer is B.
