The correct answer is D) Almost 1 million.
Almost 1 million of enslaved lived in the South in 1810.
According to the Economic History Association, almost 1 million of slaves lived in the South of the United States in 1810. The slaves represented a valuable property for the owner who sold the slaves for money and they got rich. The number of slaves in the South after the American Revolution augmented considerably. From 1.1 million in 1810 to almost 4 million in 1860.