Answer:
A. The social contract
According to Enlightenment thinkers, the social contract is an agreement in which people give up some of their freedoms in return for government protection. The idea is that individuals agree to relinquish some of their natural rights in exchange for the protection and security provided by government. This concept was developed and popularized by philosophers like John Locke and Jean-Jacques Rousseau, who believed that government should be based on the consent of the governed, and that individuals had the right to revolt against unjust governments.