Which phrase accurately describes Jean-Jacques Rousseau's concept of a social contract?

A. An agreement between people in a society to give up some of their rights in order to form a stable government

B. A set of political regulations that prevents citizens from disobeying their country's government

C. A legal system that enforces agreements made between people, businesses, and governments

D. A set of economic principles that limits a government's ability to control a country's trade and industry