What 3 factors played a role in economic prosperity experience in America following world war one

Before WWI America owed Europe a lot of money, but after WWI the situation changed and the former allies owed America more than US$ 10 Billion for the cost of armaments and food supplies.

The payment of these debt by the allies allowed the US to use this money to increase the insdustrial factories.

After the WWI a decade of tremendous prosperity started. This economic boom was a consequence of the mass production industries increasing gross domestic products, productivity and income, so business sales increase, driving up profits.