Which minority group was the most affected by the massive migration of midwestern farmer to the southwest? mexican immigrants native americans african americans irish americans

Mexican immigrants is your answer.

Midwestern farmers traveling to Southwest America would be entering into Mexico (before the Mexican-American War), which included present-day Texas stretching to present-day California.

hope this helps

The answer is B.

The U.S. avoided involvement in WWII before December 1941 because the Congress and the President wanted to believe that the war did not affect the U.S. This was called "isolationism" -the idea that a country could isolate itself from others.