题目选项分析

A mayor has proposed a fee of five dollars per day for private vehicles entering the city, claiming that the fee will alleviate the city’s traffic congestion. The mayor reasons that, since the fee will exceed the cost of round-trip bus fare from many nearby points, many people will switch from using their cars to using the bus.

Which of the following statements, if true, provides the best evidence that the mayor’s plan will fail to accomplish its goal?
 

【选项】

During the average workday, private vehicles owned and operated by people living within the city account for 20 percent of the city’s traffic congestion.