What era are you talking of? If so, then was it Beringia? Could you please specify?
Answer is
A. Reason
Hope this helps!
Answer: Same I can;t type too
Explanation:
During the ensuing decades, the abolitionist movement grew in Northern states, and Congress regulated the expansion of slavery as new states were admitted to the Union. Britain banned the importation of African slaves in its colonies in 1807 and abolished slavery in the British Empire in 1833.
The article of Confederation