What Was the Primary Reason Conservative Americans Feared the 1917

What was the primary reason conservative Americans feared the 1917 Bolshevik Revolution that took place in Russia?

A) This was the first successful revolution against a capitalist state, something that many feared was possible in the United States.
B) The murder of the Russian czar and his family during the revolution demonstrated that revolutionaries had no regard or compassion for human lives.
C) The Bolshevik success in Russia led to their conquest of postwar Germany and threatened the balance of power in Europe.
D) Conservative Americans feared that the national government would direct a repressive campaign against middle-class intellectuals sympathetic to Bolshevik ideas.