Because it was a union stronghold in the confederate states.
Most slaves lived on plantations, but the plantations were not very big: they rarely had more than 100 slaves. The best answer is then A. lived on plantations with 20 or more slaves.
Where were some of the earliest origins of agriculture and why did they occur in those locations?
One of the ancient place on Earth where the presence of humans was discovered is Ur and Uruk cities. So, some of the earliest origin of agriculture occur near those cities located in Messopotamia. Messopotamia is a place located near rivers Tigris and Euphrates. At that time is was a very fertile zone.
Benedict Arnold and Horatio Gates
