Explain how land grants accelerated the development of the railroad system in the United States

By directly providing land grants to Railroad companies, the United States government gave a direct incentive to explained the railroad network

Explanation:

As the United States increased it's territory, there were stark differences between the populated and develop North-East of the country and the newly acquired states in the South and the West.

To encourage settlement of more people, the government started to provide grant land to individuals who would set up new farms. This saw thousands of people, moving to new places and building small villages from scratch.

After this, the government provided large land grants to railway companies. While these lands did not have a lot of agriculture value, they did encompass numerous towns and villages.

With free land, Railway companies could see the potential in investing in railroads and connecting different population centres.

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you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.