The correct answer is D) decreased factory production.
The concept that was not a change that occurred in US society during the 1920s was a decreased factory production.
In was the opposite. During the "roaring 1920s," the economy of the United States was solid and the country lived a period of prosperity in which people decide to spend their money on things needed and not. This way, industries, and fabrics manufactured many things that were sold and the demand for certain was higher. They increased production. Consumerism became a part of the IUnited States economy. People had money and decide to spend it.