Answer :
They stayed and became American citizens.
Answer: Option B.
Explanation:
The Treaty of Guadalupe Hidalgo (1848) , signed on February 2, 1848, ended the war between the United States and Mexico. By its terms, Mexico ceded 55 percent of its territory, including parts of present-day Arizona, California, New Mexico, Texas, Colorado, Nevada, and Utah, to the United States.
With the Treaty of Guadalupe Hidalgo, Mexico ceded over 525 square miles of territory to the United States in exchange for $15 million and the assumption of Mexican debts to American citizens, which reopened the slavery issue.
Answer: C. They stayed and became American citizens.
Explanation: Most of the about 80,000 Mexican residents of the Southwest remained in the Southwest and became United States citizens.