Two Balls, One of Radius R and Mass M, the Other

Multiple Choice

Two balls, one of radius R and mass M, the other of radius 2R and mass 8M, roll down an incline. They start together from rest at the top of the incline. Which one will reach the bottom of the incline first?

A) The small sphere
B) Both reach the bottom together.
C) The large sphere
D) It depends on the height of the incline.
E) It depends on the length of the inclined surface.