In order to expand railroads throughout the country after the civil war,
a) brought in thousands of laborers from china.
b) provided railroad companies land free of charge.
c) spent tax money researching steam engine technology.
d) taxed the confederate states heavily to fund construction.

 B) provided railroad companies land free of charge.

Explanation: In order to build more railroads tracks, Congress provided railroad companies land free of charge. As one might imagine, this lead to significant corruption in government, but that was not the first time that happened. Chinese laborers, brought in by the thousands, came to the U.S. via private, non-government firms.

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