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People from all over the world agreed to abandon their homes and immigrated to the United States in the late 1800s.
Fleeing crop failure, land and employment shortages, rising taxes, and famine, many people came to the United States because it was seen as a place of economic opportunity.
Others came in search of personal liberty or protection from political and religious persecution, and approximately 12 million immigrants landed in the United States between 1870 and 1900.
During the 1870s and 1880s, the vast majority of these people came from Germany, Ireland, and England, which were the primary sources of immigration prior to the Civil War. Nonetheless, a sizable number of Chinese immigrants arrived in the United States between the commencement of the California gold rush in 1849 and 1882, when federal legislation prohibited their entry.
Thus Option B is the correct option for population shift in the US.
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