(A) ** Russia
(B) Germany
(C) Japan
(D) The U.S.
EXPLANATIONS BELOW
Concept note-1: -The Scare had its origins in the hyper-nationalism of World War I as well as the Russian Revolution.
Concept note-2: -Causes of the Red Scare The Bolshevik Revolution in Russia, which led many to fear that immigrants, particularly from Russia, southern Europe, and eastern Europe, intended to overthrow the United States government; The end of World War I, which caused production needs to decline and unemployment to rise.
Concept note-3: -Senator Joseph R. McCarthy was a little-known junior senator from Wisconsin until February 1950 when he claimed to possess a list of 205 card-carrying Communists employed in the U.S. Department of State.