Which statement best summarizes the period known as the Great Depression?

It was the period of slight economic downturn that affected only the very poor, as they faced high numbers of unemployment and lack of housing.
It was a period of severe economic downturn that affected farmers the worst, as people stopped buying farm products and farms were destroyed by dust storms in the great plains.
It was a period of severe economic downturn that affected businesses, farms, and everyday Americans, as unemployment and homelessness increased around the country.
It was a period of economic downturn that affected only those people who invested in stocks using credit. They were unable to pay their debts, which resulted in homelessness.

The statement that best summarizes the period known as the Great Depression is: "It was a period of severe economic downturn that affected businesses, farms, and everyday Americans, as unemployment and homelessness increased around the country."