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) urban immigrants' resistance to prohibition.
C) public anger at evolutionary science's challenge to the biblical story of the Creation.
D) the public's fear that labor troubles were sparked by communist and anarchist revolutionaries.
E) Russian Communism's threat to American security.