Answer :
The correct option is: "Mexicans and Americans were forced to live together after the Mexican War, resulting in a mix of cultures in the western United States"
After signing the Guadalupe Hidalgo treaty, around 100,000 Mexican citizens lived on the land ceded by Mexico, a population that comprised 4 percent of the Mexican population. Few of them decided to keep their Mexican citizenship. Most continued to live in the American Southwest at the time, believing that their rights would be protected. This produced a mixture of cultures between the Mexican settlers and the Americans.