TRUE!
Andrew Jackson (March 15, 1767 – June 8, 1845) was an American lawyer, general, and statesman who served as the 7th president of the United States from 1829 to 1837.
The combined Union Pacific-Central Pacific line became known as the First Transcontinental Railroad and later the Overland Route. The line was constructed primarily by Irish labor who had learned their craft during the recent Civil War.
The political situation following the decline of the Roman Empire was not particularly envy-inducing. The reason for this was that Europe had no centralized government and with that there were a mixture of tribes where each fought for their right to rule over the best areas in Europe - D.
B. Because farming still had a lot of labor and C doesn’t make sense.
Immigration would be the best option