Two Identical Conducting Spheres a and B Carry Equal Charge

Multiple Choice

Two identical conducting spheres A and B carry equal charge. They are separated by a distance much larger than their diameters. A third identical conducting sphere C is uncharged. Sphere C is first touched to A, then to B, and finally removed. As a result, the electrostatic force between A and B, which was originally F, becomes:

A) F/2
B) F/4
C) 3F/8
D) F/16
E) 0