What pushed Great Plains farmers to leave their lands and migrate to California?

A. the desire to pioneer new farming methods in the West.

B. belief in another discovery of gold.

C. difficult conditions brought on by a severe drought.

D. improved subsidies offered to California farmers.

The answer is: C. difficult conditions brought on by a severe drought.

Explanation:

Refugee farm families from the Southern Plains who migrated to California in to escape the ruin of the Great Depression and the Dust Bowl.

The Great Plains entered a decade-long drought. Suitcase-farming speculators wrote off their investments, but everyone's farms began to blow away in spectacular dust storms.