What were TWO causes of the Dust Bowl?
A.
overpopulation of urban areas in the American West
B.
an extended drought that affected much of the country
C.
rising prices for farm equipment and wages for farm workers
D.
conflicts between farmers and American Indians over land rights
E.
a poor understanding of the Great Plains' ecosystem among farmers
B. an extended drought that affected much of the country
E. a poor understanding of the Great Plains' ecosystem among farmers