Question

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

Answer 1

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

The immediate cause was the dispute over whether Texas's southern border was the Rio Grande (U.S. claim) or the Nueces River (Mexico), which led to clashes after U.S. forces moved into the disputed area following Texas's annexation.