What Event Was a Direct Result of the Home Fronts

Multiple Choice

What event was a direct result of the home fronts'  participation  in the war effort?

A) The installation of a Marxist regime in Moscow.
B) Women gained the right to vote as a reward for service.
C) A wave of nihilism swept through Europe.
D) The ideals fought for were clear and implemented in postwar Europe.
E) The science and progress of the pre-war period continued.