B. Descendants of Spanish settlers
Explanation:
- The Treaty of Guadalupe Hidalgo is a peace treaty that ended the Mexican-American War (1846-1848).
- Under the treaty, Mexico left the United States of America with a size of 1.36 million km², which was more than half of Mexico's area.
- Mexico recognized the Rio Grande River as the border between its territory and Texas.
- The treaty was signed on 2 February 1848 at the Cathedral of Guadalupe Hidalgo and entered into force on 30 May of the same year.
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