From the Russian Revolution to the Fall of the Soviet

From the Russian Revolution to the fall of the Soviet communist government, what was the policy of the government towards religion?

A) All churches were closed.
B) The old church was replaced by Eastern Orthodoxy.
C) Churches remained open but played a limited role.
D) Youth were encouraged to attend so that they could be indoctrinated into communism.
E) Nearly all marriages were performed by clergy.