Which of the following BEST describes the contribution of railroads to the economic development of the United States? A. lowered costs of shipping in the United States B. allowed more immigrants to enter the country C. enabled trade to most parts of the country D. provided good investment opportunities

C. enabled trade to most parts of the country

Explanation:

In the United States, railroads began to the built in the early nineteenth century, and by the late nineteenth century, most of the country was connected by a extensive railroad network.

This network allowed trade to flourished in most of the country. All kinds of goods could be shipped back and forth between the different regions, for example, meat from Texas to Northeast, or Manufactured Goods from Ohio and Michigan to California.

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c is the correct answer for this question.