这题选什么呀？请高手帮个忙！

Q33:              

Which of the following, if true, most logically completes the passage?

A recent poll found that over 80 percent of the residents of Nalmed Province favored a massive expansion of the commuter rail system as a means of significantly easing congestion on the province’s highways and were willing to help pay for the expansion through an increase in their taxes.  Nevertheless, the poll results indicate that expansion of the rail system, if successfully completed, would be unlikely to achieve its goal of easing congestion, because _______.

1. most people in favor of expanding the rail system reported less congestion during their highway commute as the primary benefit they would experience
2. of the less than 20 percent of residents not counted as favoring the expansion, about half claimed to have no opinion one way or the other
3. the twice-daily periods of peak congestion caused by people commuting in cars have grown from about an hour each to almost two and a half hours each in the past 20 years
4. expanding the commuter rail system will require the construction of dozens of miles of new railbed
5. the proposed expansion to the commuter rail system will make it possible for some people who both live and work at suburban locations to commute by rail

答案是A， 我猜他是不是表达其实说高速公路拥挤的人并不真正的是因为高速公路拥挤而提出提议 而是因为他们认为他们自己应该享受到高速公路空旷这种待遇 所以如果政府扩展铁路并不会减少高速公路的拥挤？？ 连我自己都不敢相信这样的解释会是对的，还是请各位高手帮忙吧！ 谢谢了。。

A：那些人支持铁路系统的扩容是因为他们会因此而获益

获益：铁路扩容会有更多的人放弃公路选择铁路，那么公路将更加的空旷，那些人将会从中获益。

如果大家都这样想，这个计划就不可能成功