Answer:
B. Though the United States eventually abolished slavery, fierce
regional disagreements about the system kept it in place
throughout much of the century.
Explanation:
During the 18th and 19th centuries, the agency maintained a strong position. Before the Civil War, slavery was a very profitable enterprise, especially rooted in the south. When the civil war ended and slavery was abolished, most southern states struggled to maintain it. The resistance of this southern slavery completely freed slavery and their desire to lead them to new parts of the country created an atmosphere of separation between the north and the south after the civil war.