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Problem on enhanced interstate highways

Can someone help me in finding out the right answer from the given options. In the year 1950 the federal government enhanced interstate highways, therefore decreasing the: (1) Demand for and the volume of highway travel. (2) Growth rate of city sprawl. (3) Demand for intercity rail travel. (4) Pollution caused by more rapidly highway speeds. (5) Rates of urban-rural turn-around.

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