The main result of the Dust Bowl in the 1930s Midwest was: 1)The development of fertile topsoil in the Great Plains.
2)The mass migration of agricultural workers to California.
3)The creation of a guest worker program along the U. S. Mexico border.
4)All of the above.

1. the fifteenth amendment guaranteed for all us citizens, regardless of "previous condition of servitude." freedom citizenship voting rights religious tolerance 2. which group was still not allowed to vote following passage of this amendment? women poor men rich men former slaves 3. the fifteenth amendment was the last of the amendments. carpetbagger lincoln reconstruction scalawag