Which of the Following Describes the Difference Between the Bolsheviks

Which of the following describes the difference between the Bolsheviks and the Mensheviks prior to the Russian Revolution?

A) The Bolsheviks were much less structured.
B) The Mensheviks rejected the teachings of Lenin.
C) The leadership of the Mensheviks was more open.
D) The Bolsheviks represented a very small minority.
E) The Mensheviks wanted to reinstate the Czar.