A C D I think might be wrong tho
As the first peaceful transition of political power between opposing parties in U.S. history, however, the election of 1800 had far-reaching significance. Jefferson appreciated the momentous change and his inaugural address called for reconciliation by declaring that, "We are all Republicans, we are all Federalists."
For more info http://www.ushistory.org/us/20a.asp
B. Slavery, because they would be pushed to do more work.
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They used what they industrialized to take over and fight other countries
It is A ( separation of powers)
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