The Red Scare of 1919-1920 Was Provoked by

The red scare of 1919-1920 was provoked by

A) the wartime migration of rural blacks to northern cities.
B) the strict enforcement of prohibition laws.
C) evolutionary science's challenge to the biblical story of the Creation.
D) the association of labor unrest with the fear of Bolshevik revolution.
E) the infiltration of Communist agents into the labor movement.