Question

Which of the following contributed to the beginning of the Mexican War?
A.
President Polk wanted to annex Oregon.
B.
Mexico attacked American troops in California.
C.
President Polk wanted to annex Texas.
D.
Mexico attacked American troops in Oregon.

Answer 1

C. President Polk wanted to annex Texas — the U.S. annexation of Texas and the resulting border dispute (Rio Grande vs. Nueces River) helped trigger the Mexican–American War.