A troubling economic problem in the 1920s was the depressed state of agriculture caused by "<span>c. Overproduction and falling prices," since demand for many products, including these, plummeted due to decreased incomes. </span>
Answer:
The Republican Party
Explanation:
The Republican Party promised not to get between the states and slavery, but then refused to further expand slavery into the territories.
They analyzed the work of other historians to draw a conclusion.
You can check other sources as well