Answer:
A. The group that supported Communists during the Russian Civil War --- Reds
B. A radical political party that believed a revolution was the only way to bring about change in czarist Russia --- Bolsheviks
C. The group that supported czarists during the Russian Civil War --- Whites
Explanation:
A- The members of revolutionary communism who participated in the confrontations of the Russian Revolution of 1917 were called Reds.
B- The Bolsheviks were a radicalized political group within the Russian Social Democratic Labor Party, led from the beginning by Vladimir Ilyich Ulyanov, also known as Vladimir Lenin, and later by Iosif Vissarionovich Dzhugashvili, also known as Stalin.
C- The White Movement was made up of Russian counterrevolutionary nationalist forces, in many cases Pro-czarists, who after the October Revolution fought against the Red Army during the Russian Civil War from 1918 to 1921. They were supported by Western governments in the face of the threat of a world communist revolution.
