In 1917, communist revolutionaries overthrew the Russian government and established the Soviet Union. While they
fought on the same side during World War II, the Soviet
Union and Western democracies like the United States
became rivals in the mid-20th century. This conflict
became known as the Cold War.

A. Some historians believe that Russia was founded by Vikings in 862
B. Russian is one of the most widely spoken languages in the world.
C. World war ll was the most destructive conflict in human history.
D. Russia was ruled by leaders with absolute power from 1721 until 1917.