Which of the following MOST contributed to the economic boom of the 1920s?

A.
Prohibition led to an increased consumption of goods.

B.
The Harlem Renaissance led to increased prosperity for lower class Americans.

C.
Automobiles became increasingly common and led to growth in auto-related industries.

D.
The Suffrage movement led to greater economic opportunities for women.

C. Automobiles becoming increasingly common and leading to growth in auto-related industries was the primary contributor to the economic boom in the 1920s. The automobile industry created millions of jobs, stimulated growth in industries such as steel and rubber, and contributed to the rise of new consumer culture. Prohibition, the Harlem Renaissance, and the Suffrage movement had their own impacts on society and culture, but they did not significantly contribute to the economic boom of the 1920s.