What Is the Difference Between Evolutionary and Revolutionary Social Change

What is the difference between evolutionary and revolutionary social change?

A) Evolutionary social change is political in nature. Revolutionary social change is related to social issues, i.e. worker's rights or civil rights.
B) Evolutionary social change implies a gradual transformation, while revolutionary change implies a sudden transformation, usually involving violent struggle or force.
C) Evolutionary social change refers to transformations related to a biological progression. Revolutionary social change is manmade and self-directed.
D) Both a and b, but not c
E) None of the above