I need help on this and I am confused: How did the condition of farmers or manufacturing workers before the Great Depression contribute to its effect(s)?

1. Farmers and workers earned so much money in the 1920s that they forgot how to save.
2. Farmers and workers earned so much money in the 1920s that they forgot how to save.
3. Farmers and workers had joined together to riot against wealthy titans of industry.
4. Farmers and manufacturing workers were charging so much for their services that no one could pay.