The correct answer is C. American settlers owned slaves, which violated Mexican law.
Explanation:
During history, there had been multiple conflicts between the U.S. and Mexico, during the 19th century these conflicts were caused by the ownership of territories between both countries. Indeed before 1819, there were conflicts to set the border between the territories but in 1819 the countries agreed on the borders and the U.S. cede multiple territories to Mexico, including Texas, New Mexico, and Arizona.
Considering Mexico had control over Texas and aimed at ending the influence of the U.S. over the territory, the Mexican government decided to ban the immigration from U.S. citizens to Texas and abolished slavery. These actions lead to multiple conflicts because American settlers or citizens that lived in Texas owned slaves and continue owning slaves even after Mexico decided to ban this. Indeed, after this, Texas began fighting for its independence and became part of the U.S. again in 1845 to continue as a state in favor of slave. Therefore, the American settlers in Texas have a conflict with the Mexican government during the 1830s mainly because American settlers owned slaves, which violated Mexican law.
