A Decade After World War I Ended,a Significant Event Occurred

A decade after World War I ended,a significant event occurred that caused consumer sales resistance,corporate budget cutting and advertising expenditures to plummet.This event was:

A) the imposition of a personal income tax by the federal government.
B) the defeat of Germany and its default on loans that had been granted to them by the victors of the conflict.
C) the crashing of the stock market in October 29,1929.
D) the creation of the World Bank,which made additional revenues available to state and federal banks.
E) strong challenges to the idea of a system of consumer credit that had been advocated by the federal government.