Logically Completes... Anyone please explain how to solve it

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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 _______.
A. most people in favor of expanding the rail system reported less congestion during their highway commute as the primary benefit they would experience
B. 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
C. 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
D. expanding the commuter rail system will require the construction of dozens of miles of new railbed
E. 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

Here it says 80% said the rail system will help to reduce the congestion... But the rail system doesn't help to reduce the congestion because either people are not using the rail system or many more people use the roads now... so i choose A and C... Is my narrowing the answer choices correct... Please suggest an approach to solve the logically complete the passage problems... thanks...

BTW Answer is A
Source: — Critical Reasoning |

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by killer1387 » Sat Mar 31, 2012 8:42 pm
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 _______.

A. most people in favor of expanding the rail system reported less congestion during their highway commute as the primary benefit they would experience

The gap here is filled by A which explains correctly the reason why the goal wont be achieved.

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by Bill@VeritasPrep » Sat Mar 31, 2012 9:17 pm
Essentially, A says the majority of people in favor of expansion intend to keep driving (that's why less highway congestion is their primary benefit). If this is true, then most people will still keep driving, and congestion will continue to be a problem.

C talks about the duration of congestion, which was not mentioned in the stimulus.
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