C is your answer The United States offered Europeans many more opportunities to migrate.
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The Saint Valentine's Day Massacre is the name given to the death of seven people as part of a Prohibition Era conflict between two powerful criminal gangs in Chicago, Illinois, in the summer of 1929: the South Side Italian gang led by Al Capone and the North Side Irish gang led by Bugs Moran
Because Africans were poorly treated and everyone finally saw the way they were treated.
4 presidents were killed, Abraham Lincoln, James A. Garfield, William McKinley, and John F. Kennedy.
Answer:
The Connecticut Compromise.
Explanation:
The Connecticut Compromise was an agreement made during the discussions for the approval of the Constitution in 1787, whereby the most and least populated states of the nation agreed on the way in which to organize the United States Congress without any of the these groups of states have an unfair advantage over the other. Thus, a bicameral Congress was organized, with a chamber organized in an egalitarian manner (the Senate) and another in proportion to the population of each state (the House).