The red scare was a response to
a. prohibition.
b. the teapot dome scandal.
c. the russian revolution.
d. the kellogg-briand pact.

The Red Scare was a response to the Russian Revolution. The correct option among all the options given in the question is option "c". The Red Scare was in response to the Bolshevik Revolution that had taken place in Russia in the year 1917. The Red Scare happened between the years 1919 and 1920. The Red Scare got amplified by the nationalism generated by World War I. Many American people were shaken by the fear that such a revolution could start any time in America.