The Mexican-American War of 1846 -1848 was justified in the opinions of many by
a. the Monroe Doctrine.
b. Manifest Destiny.
c. imperialism.
d. isolationism.
The Mexican-American War of 1846 -1848 was justified in the opinions of many by "B. Manifest Destiny," since this held that the US was "destined" to acquire all the territory between the Atlantic and Pacific.
