I would say A only because it says the societies meaning the people, not the actual area like what kind of new people settled there after the slaves were taken. Second, C doesn't make sense because the only technology that came to be was in the North and that was when slavery was being taken care of. Lastly, D is correct but, slaves were still brought to the U.S. and if it devastated the population, there would be little to no slaves.
C, he gained one of the largest empires
Old history work contained mythology. Modern history work covers anything that happened at the last 220 years of human existence(after French revolution).
D. Crossing a river at the border
