What made cattle drive become popular

Cattle drives were a major economic activity in the 19th century American West, particularly between 1856 and 1896 . In this period, 27 million cattle were driven from Texas to railheads in Kansas, for shipment to stockyards in Louisiana and points east. The long distances covered, the need for periodic rests by riders and animals, and the establishment of railheads led to the development of "cow towns" across the frontier.

Due to the extensive treatment of cattle drives in fiction and film, the horse has become the worldwide iconic image of the American West, where cattle drives still occur.[1]

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your answer whould be d

it was the "4. potsdam" conference that demanded the unconditional surrender of japan, since it was clear that the japanese would continue to find until the very last man otherwise.