Answer:
it was used on a much larger scale for the purposes of mass agricultural labor, as it was an economic alternative to other workers. However, without the large plantations of cash crops that needed such slave labor in the North, the Northern slaves were less common and not a primary source of agricultural production.
I bielieve the answer is the last choice which is that <span>Panama agreed to allow the United States to build a canal there.
hope this helps
Ps Fun fact did you know that we dont own the canal anymore panama has full control
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