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