Question

the conclusion of the mexican american war raised the stakes in the fight over
( ) the border with canada.
( ) the bear flag republic.
( ) the missouri compromise.
( ) slavery in the united states.

Explanation:

The Mexican - American War resulted in the US acquiring a large amount of territory from Mexico. The question of whether slavery would be allowed in these newly acquired territories became a major issue, intensifying the fight over slavery in the US. The border with Canada was not a major issue raised by the war's conclusion. The Bear Flag Republic was a short - lived independent state in California before the war, and the Mexican Compromise is not a major issue related to the war's aftermath in terms of "raising the stakes" in a major fight.

Answer:

D. slavery in the United States