What was the name given to the widespread fear of suspected communists and radicals in the united states after world war i?
a. red scare
b. radical fear
c. revolt revulsion
d. communist scare

Red Scare was the name given to the widespread fear of suspected Communists and radicals in the United States after World War I. The correct option among all the options given in the question is option "A". The first Red Scare happened in the United States during the 20th century and the reason was hyper nationalism in respect to World War I.

The answer should be europe