When two solid spheres simultaneously start rolling from rest down an incline, one sphere having twice the radius and twice the mass compared to the other, which of the following statements is true?
a) The larger sphere will reach the bottom of the incline first.
b) The smaller sphere will reach the bottom of the incline first.
c) Both spheres will reach the bottom of the incline at the same time.
d) The mass and radius do not affect the time taken to reach the bottom.