[求助]OG11紫39题，即OG10-77

77. 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) 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.

解释不是很明白。。。。。为啥选b啊

OG10上的解释：

77. The mayor’s reasoning rests on assuming that, if it costs more to travel to the city by car than by bus, people
will choose to travel by bus rather than by car. Choice B provides evidence that this assumption is false, and is
therefore the best answer.
Choice A does not undermine the mayor’s view that the five-dollar fee will provide an incentive to switch to buses.
Choice C makes it unlikely that the bus system will lose current riders if new riders are attracted. Choice D is
inappropriate since many drivers not switching to buses is entirely consistent with many people making the
switch. Choice E supports the mayor’s proposal by indicating that vehicles entering the city produce most of the
city’s congestion.

哦 好像有点明白了

恩 再想想