How did farmers contribute to the problems that led to the dust bowl?

Farmers used to prepare the soil to be seeded and for that, they plowed the soil too fine. It worked fine for years, but there was a period of drought and then the dry and light grains of soil were picked up by the wind and caused the Dust Bowl. Because of that, Congress passed the Soil Conservation Act that called for changed in plowing techniques, so this would not happen again.

there are no mutiple choices here

c. troops marched forward in close formation against newer, more accurate weapons