In which of the following ways did the 1920s wealth gap contribute to the start of the Great Depression?

AThe wealth gap led to a decline in stock investments during the 1920s.

BA concentration of wealth led to less spending across the economy.

CMany of the rural poor were forced into subsistence farming.

DThe wealth gap led to heavy emigration from the United States and shrinkage of the economy.

I think it's C. But I am not sure.