Economic reasons, slaves were vital to working on plantations.
Abraham Lincoln signed the Emancipation Proclamation on January 1, 1863.
The correct answer is France. They wanted to weaken Britain who was a major force in Europe and they also had good relations with British colonies so they decided to help hoping that one day when the war is over the colonies would work together with France and trade and things like that.
The restoration of Chinese rule, the voyages of Zheng he, and the reintroduction of civil service examinations are all associated with the rise of nationalism, among other things.
I don’t know sorry I couldn’t help
