A glass rod is rubbed with a silk scarf producing a charge of +3.2 × 10⁻⁹ C on the rod. (Recall that the magnitude of the proton and electron charges is 1.6 × 10⁻¹⁹ C.) The glass rod has:

A. 5.1 × 10¹¹ protons added to it.
B.5.1 × 10¹¹ electrons removed from it.
C. 2.0 × 10¹⁰ protons added to it.
D. 2.0 × 10¹⁰ electrons removed from it.