单选题 A certain mayor has proposed a fee of five dollars per day on 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 reasoning is flawed?

A、 Projected increases in the price of gasoline will increase the cost of taking a private vehicle into the city.
B、 The cost of parking fees already makes it considerably more expensive for most People to take a private vehicle into the city than to take a bus.
C、 Most of the people currently riding the bus do not own private vehicles.
D、 Many commuters opposing the mayor's plan have indicated that they would rather endure traffic congestion than pay a five-dollar-per day fee.
E、 (E) During the average workday, private vehicles owned and operated by people living within the city account for twenty percent of the city's traffic congestion.

【正确答案】 B

【答案解析】[解析] 该市长的推理建立在假设如果开车进城比乘坐公共汽车更贵，人们会选择乘坐公共汽车而不是自己开车上班，选项(B)提出一个这种假设是错误的证据，因此是正确答案。
选项(A)没有削弱该市长的观点即五美元将刺激人们换乘公共汽车。选项(C)使得如果吸引了新的乘客之后，公共汽车系统不太可能失去目前的乘客。选项(D)不合适，因为许多自己开车的人不转为乘从公共汽车与许多自己开车的人转为乘坐公共汽车完全没有矛盾。选项(E)通过指出进入市区的车辆占该城车流量的大部分来支持该市长的建议。