C because making the places where the crops would grow was dusty and every time wind would come through it would swoop the dust up in the air because of the groves
An Act to limit the immigration of aliens into the United States. The Emergency Quota Act, also known as the Emergency Immigration Act of 1921, the Immigration Restriction Act of 1921, the Per Centum Law, and the Johnson Quota Act (ch. 8, 42 Stat. 5 of May 19, 1921) restricted immigration into the United States.
Any time cultures interact (example: immigration) they impact each other and cause culture change. Ideas and cultural concepts are constantly spreading and moving and changing.