How did increased production due to mechanization affect the economy in the us in the 1920’s?

The 1920's was also known as the roaring 20's due to all the industrialization and mechanization. It affected the economy in a good way like causing the rise of the automobile, which helped expand other industries since cars require vast amounts of steel, glass and rubber. Businesses created new ways to produce goods quickly, which is called mass production. All the mechanization also lead to the widespread of electricity and soon in the 1920s more than 60% of American homes. Another great thing was that people also started buying shares of stock in companies to help make them rich. (Stock exchange is a system of buying and selling small parts of corporations in which people would invest in)

Answer might be b i think