Crowding on Mooreville's subway frequently leads to delays, because it is difficult for passengers to exit from the trains. Subway ridership is projected to increase by 20 percent over the next 10 years. The Mooreville Transit Authority plans to increase the number of daily train trips by only 5 percent over the same period. Officials predict that this increase is suffi cient to ensure that the incidence of delays due to crowding does not increase.
Which of the following, if true, provides the strongest grounds for the officials' prediction?
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ABy changing maintenance schedules, the Transit Authority can achieve the 5 percent increase in train trips without purchasing any new subway cars.
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BThe Transit Authority also plans a 5 percent increase in the number of bus trips on routes that connect to subways.
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CFor most commuters who use the subway system, there is no practical alternative public transportation available.
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DMost of the projected increase in ridership is expected to occur in off-peak hours when trains are now sparsely used.
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EThe 5 percent increase in the number of train trips can be achieved without an equal increase in Transit Authority operational costs.
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正确答案: D