According to the Tristate Transportation Authority, making certain improvements to the main commuter rail line would increase ridership dramatically. The authority plans to finance these improvements over the course of five years by raising automobile tolls on the two highway bridges along the route the rail line serves. Although the proposed improvements are indeed needed, the authority's plan for securing the necessary funds should be rejected because it would unfairly force drivers to absorb the entire cost of something from which they receive no benefit.
Which of the following, if true, would cast the most doubt on the effectiveness of the authority's plan to finance the proposed improvements by increasing bridge tolls?
(A) Before the authority increases tolls on any of the area bridges, it is required by law to hold public hearings at which objections to the proposed increase can be raised.
(B) Whenever bridge tolls are increased, the authority must pay a private contractor to adjust the automated toll-collecting machines.
(C) Between the time a proposed toll increase is announced and the time the increase is actually put into effect, many commuters buy more tokens than usual to postpone the effects of the increase.
(D) When tolls were last increased on the two bridges in question, almost 20 percent of the regular commuter traffic switched to a slightly longer alternative route that has since been improved.
(E) The chairman of the authority is a member of the Tristate Automobile Club that has registered strong opposition to the proposed toll
increase.
答案选D，我也是选D，但是是因为其它选项都被我删光了所以才选这个答案。
我也看过之前的讨论串，但仍不懂这个选项为什么会反驳原文。 想破头了,仍不知怎么解 可以指点一下D的意思吗?
想破头了,仍不知怎么解
可以指点一下D的意思吗?
谢谢~
个人理解
D 当对那两座桥收费的时候，大概有20%的人会改道。
本来计划是5年的，少了20%的人，5年就完成不了了。
希望批评指正。
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