How did the Russian Revolution of 1917 affect World War I?
O
A. It produced a new communist government in Russia that withdrew
from the war.
O
B. It led Russia to rapidly industrialize in order to build enough
weapons to join the fighting.
O
C. It forced Russia's czar to abandon the Allies and swear allegiance
to the Central powers.
O
D. It prevented Russia's troops from defending its borders, allowing
Germany to successfully invade.