Which of these was one cause of the outbreak of the red scare? . a. the revolution in russia. b. the wall street bombing. c. the sacco-vanzetti case. d. the end of the great war

The revolution in Russia is the one among the following choices that was one cause of the outbreak of Red scare. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer you were looking for and it has helped you.