How were farmers affected in the dust bowl?
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a. they switched from growing wheat to ranching.
b. they could not repay their loans or afford to buy basic necessities.
c. they had to grow new crops on the improved soil.
d. they went further into debt to buy new equipment.

B. They could not repay their loans or afford to buy basic necessities.

Explanation:

The Great Dust Bowl affected the Great Plains specifically, which most of the US farmers were located at (due to the large area of leveled plains). However, with over use of the land (which wore away the top soil), and the dry climate due to drought, the land slowly became dry, and the "dust" was able to be carried by the strong winds, hence the name "Dust Bowl". This spread the dust in large areas, and with the dry climates, made it hard for the farmers to farm, leading to their economic demise.

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b)

it created free trade throughout the colonial territories.