E. It so stated that it started with the crashing of the stock market.
New technology had improved lives in the 20s drastically because factories started producing items people had never used or seen before, a specific example would be washing machines and refrigerators. sellers started to sell them for higher prices because people didn't exactly know what they were and assumed it would make their lives easier
The ideas of enlightenment were that people should not be ruled by monarchs who inherit their titles, but that they should educate themselves and rise in their social environment. French revolutionists were inspired by this and wanted to remove their king from the throne.
European traders disrupted West Africa through the African Slave Trade. By enslaving Africans, they disrupted not only the West African population, but they often traded the slaves for European goods. These goods made the kings powerful, widening the gap between those in power and the poor.