The idea that governments exist only by the consent of the people was first popularized by which enlightenment philosopher a. thomas jefferson b. john locke c. thomas hobbes d baron de montesquieu

The correct answer is B) John Locke.

John Locke is a famous Enlightenment philosopher that wrote the book called Two Treatises of Government. This book included ideas that would be used by several different countries, including the US. One of the most popular ones was the idea that the political power within a country resides in its citizens, not the government leaders. 

Americans agreed to the settlement terms established by the mexican government.