D, because the South's economy depended mostly on agriculture
Answer: C) Social Contract Theory
Explanation:
It is a theory that originated in the Enlightenment. The essence of the theory concerns the legitimacy of the state's authority and its institutions over the individual. There have been cases of people "selling" certain freedoms throughout history because of certain other concessions. This term was first used by Jean-Jacques Rousseau, who was active during the Enlightenment.
This is more of a question that needs you to answer in your own opinion.
They taught people how to speak Chinese too