There were no longer slaves involved
The Monroe Doctrine stated that the United States would not get involved in European conflicts in Latin America. Option C is correct.
The Monroe Doctrine was passed on 2nd December in the year 1823 and stated that the United States would not get involved in European wars or even internal affairs of the European countries.
The Monroe Doctrine constituted a United States policy of opposing European colonialism in the Americas beginning in 1823.
A lot of historians believe the battle of Fort Sumter was the start of the war, as it was the first official battle. However, there were zero casualties.
A lot of other people believe when Lincoln was elected was the start, because that event led many southern states to secede very quickly.
Answer:
The border states amid the Civil War were the slave expresses that didn't leave the Union.
