What Was the Purpose of the Treaty of Brest-Litovsk

What was the purpose of the Treaty of Brest-Litovsk?

A) A friendship treaty between Russia and the United States for mutual aid.
B) The treaty between Russia and the Central Powers that removed Russia from the war.
C) The treaty between the Red and White Russians for partition of the country.
D) A treaty among the communists to agree to work together for the betterment of Russia.
E) A treaty between England and France to continue the war against Russia.