Which of the following factors led to the mass immigration of midwesterners to the southwest? select all that apply.
a) drought
b) farm foreclosures
c) improper farming practices
d) better-paying jobs

The correct answer is A: Drought and D: Better-paying jobs.

In the 1930s, farmers from the Midwestern Dust Bowl states, especially Oklahoma and Arkansas, began to move to California. A drought outbreak in the 1930s allowed dust storms to carry away topsoil, darkening the sky even at mid-day,  As families realized that the drought and dust storms would not end, some sold what they could not take and began to migrate southwest. Many hoped to become hired hands on California farms.