Answer:A) African americans were promised the right to vote
While North Carolina agreed with the Union's views of Slavery, South Carolina did not and therefore it seceded from North Carolina and joined the rest of the South in trying to secede from the Union.
A lot of people invested in the stock market in the 1920s because they could buy stocks 'on the margin', and hence, required little initial capital. 'Buying on margin' means that you leverage an asset by borrowing money from a lender.
Leif Eriksson! :)
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