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.

4

Explanation:

you're welcome sir or maam bxjsushjendosi2gsb

. political or economical policy that isolates a country from participating in international relationships. it has been suggested that the united states participates in isolationism because of its lack of involvement in particular wars or alliances.

an earnest tone.

because portia wants to know why brutus has been acting strange lately.