TGC wrote:
A cost-effective solution to the problem of airport congestion and the pollution it causes is to provide high-speed train service between major cities in China, lying 300 to 800 kilometers apart. This plan would cost far less than the expansion of existing airports and would reduce the number of airplanes clogging airports and polluting the air.
Which of the following, if true, could opponents of the plan most appropriately cite as a piece of evidence for their objection to the plan?
In order
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