Which development in the second decade of the 20th century most contributed to the spread of a mass consumer culture in the Unit
ed States? A. Americans began borrowing huge amounts of money from rich European states.
B. The American middle class had ample leisure time and disposable income.
C. Prohibition greatly reduced the amount of time Americans spent in pubs and saloons.
D. Fundamentalist Christian groups began actively promoting the doctrine of materialism.
