During the construction of the transcontinental railroad in the united
a. cities on the coasts were cut off from the rest of the country.
b. many people lost interest in new settlements.
c. civil war refugees fled to new towns in the western territories.
d. many new towns and settlements grew.

D. many new towns and settlements grew.

Explanation:

The system of road made a significant contribution to the formation of the United States as an economic power and an industrial nation. The fertile lands of the West attracted a huge number of immigrants, who in the shortest period of time began to develop agriculture on them.

The railroad created many villages along the way: Fremont, Elkhorn, Grand Island, North Platt, Ogallala and Sydney, as the railroad followed Platt through Nebraska.

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explanation:

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