Two Uniform Solid Spheres Have the Same Mass,but One Has

Multiple Choice

Two uniform solid spheres have the same mass,but one has twice the radius of the other.The ratio of the larger sphere's moment of inertia about a central axis to that of the smaller sphere is

A) 4/5.
B) 8/5.
C) 1/2.
D) 2.
E) 4.