How Would You Distinguish Between a Civil War and a Revolution

Multiple Choice

How would you distinguish between a civil war and a revolution?

A) A civil war describes a process and a revolution an outcome.
B) A civil war describes an outcome and a revolution a process.
C) A civil war will most certainly end in revolution.
D) A revolution refers to a dramatic change of regime, while a civil war replaces one leader with another through use of force.
E) Both mean the same.