Question

The Mexican-American War was sparked by a dispute over
A.
the location of the border between the two countries.
B.
the amount of the tariff on Mexican goods.
C.
the creation of trade barriers between the two countries.
D.
the number of troops on the Mexican border.

Answer 1

A. the location of the border between the two countries.

The war followed the U.S. annexation of Texas and a dispute whether Texas's southern border was the Nueces River (Mexico's claim) or the Rio Grande (U.S. claim); clashes in the disputed area led to war.