The one that declared that slavery was necessary was John C. Calhoun.
He was a US South Senator.
He was a political leader. He was a congressman, a secretary of war, a vice president, a senator, and a secretary of state. He believed that slavery was a symbol of the south and that it was something possitive.
they had to change everything up because the cause was to spread change
after and before there where innovations that could not be changed without war
C: Schism
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Answer:
D. worked long hours for low pay in factories.
Explanation: