medium · LSAT Logical Reasoning

A government should fund a public project only if the project's benefits to society outweigh its costs. The proposed high-speed rail line would cost far less than the combined value of the commuting time it would save and the pollution it would prevent. The transit commissioner therefore concludes that the government should fund the rail line.

Which one of the following, if true, most strengthens the commissioner's argument?

  1. The estimate of commuting time saved assumes ridership levels the line is unlikely ever to reach.
  2. The proposed line would be the fastest high-speed rail system in the country.
  3. Every public project whose benefits exceed its costs has proven overwhelmingly popular with voters.
  4. Most commuters surveyed say that high-speed trains are more comfortable than the buses they currently use.
  5. The rail line would impose no significant costs on society beyond those already reflected in the comparison.

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