people looking for farm work during the great depression often moved to the dust bowl. commercial farms…

Brief Explanations:

During the Great Depression, many people from the Dust - Bowl region (including Oklahoma) who lost their farms due to drought and economic hardship migrated in search of farm work. California had a large agricultural industry and was a destination for these migrants in hopes of finding employment in farming. The Dust Bowl was an area affected, not a destination for farm - work seekers. Commercial farms is a general term and not as specific as California as a destination. Oklahoma was a source area of migrants rather than a destination for those seeking farm work.

Answer:

C. California