After the Civil War, African-Americans received a great deal more freedom and choice than they had before, and many decided to relocate to the north since they were free to do so.
With the protections of the Thirteenth, Fourteenth, and Fifteenth Amendments to the Constitution, as well as the Civil Rights Act of 1866, African Americans were able to vote, actively engage in the political process, purchase previous owners' land, and seek their own property after the Civil War.
So, option "C" is the correct answer to the following question.
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