A. Anyone who wanted to build railroads could get some land. B. "Land grant colleges" had land. C. People moved to the new areas which had became states. D. There were a lot of family farms after 1862. 参考答案:C 答案解析:向中西部移居的农民所去的地方当时没有成立州,一旦人口达到一定数量,方可成立州,美国在原有13州的基础上开始扩大。