According to e2020 it was
C. evaluating sources.
In the early 1900s, Russia was one of the most impoverished countries in Europe with an enormous peasantry and a growing minority of poor industrial workers. ... The emancipation of serfs would influence the events leading up to the Russian Revolution by giving peasants more freedom to organize.
They did not, the western allies did not know about the holocaust until after they conquered Germany and they immediately freed all the Jews from the concentration camps.