Answer:
A: Workers could move freely between nations
Explanation:
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In United States v. Nixon, the Supreme Court’s ruling made it clear that (A. the executive branch is the most powerful branch, but the president must still obey the law.)
They sometimes grew food for the union army (while the plantation owners were away).
Yes, enslaved individuals were brought to the British North American colonies and the United States by the African slave trade before it was outlawed in 1808.
He was the leader when the United States was an industrial and agricultural success.