Which of the following statements is/are correct?

A. Karl Marx's theories served as the foundation for socialism in Russia.

B. Marx believed that in order for workers to be free from the exploitation of capitalism, they needed to create a society that was truly socialist and in which all property was socially controlled.

C. The "February" Revolution occurred on March 12th, and the "October" Revolution occurred on November 7th.

D. The socialists took over the government in Russia through the February Revolution of 1917, and the events of February are normally called the Russian Revolution.