Answered

Farmers contributed to the problems that led to the Dust Bowl by
a. putting down new layers of topsoil.
b. moving off of the plains to find new farmland.
c. damming western rivers and using irrigation techniques.
d. using intensive farming practices that removed protective grasses.



Answer :

PrudentAysegul
The answer is D 
(using intensive farming practices that removed protective grasses.)

Hope it helps :) 

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