Although this depends slightly on what period you're referring to during this time, the best answer would be that "Immigrants" made up the largest percentage of workers in American industry during the late nineteenth century, since the economy had shifted towards industrial output as opposed to agrarian output.
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Answer:
October 12, 1492
Explanation:
Columbus left Castile in August 1492 with three ships, and made landfall in the Americas on 12 October (ending the period of human habitation in the Americas now referred to as the pre-Columbian era). His landing place was an island in the Bahamas, known by its native inhabitants as Guanahani.
Their government was mostly consisting of corrupt bureaucrats and ineffective economic policies that mostly helped the rich stay rich and the poor stay poor. In between them was a king who tried to implement some more liberal policies for the people, but Alexander III mostly reversed them all because he didn't want his autocracy to be challenged.<span />