Which of the following was one cause of the Mexican-American War Mormons moved into Mexican territory Mexico offered to sell California President Polk purchased Texas the United States Annex Texas

Answer 1

The primary cause of the Mexican-American War among the options you provided is "the United States annexed Texas." The annexation of Texas in 1845 was a significant factor in the war, as it led to tensions between the United States and Mexico, which still considered Texas a part of its territory. The other options listed do not directly relate to the causes of the war.