If a neutral metal object has been charged by friction to a charge of one pc, what has happened to it electrically?

If a neutral metal object has been charged by friction to a charge of one pc, what has happened to it electrically?

A. 6.25 × 106 electrons have been added to it.
B. 6.25 ×106 protons have been added to it.
C. 6.25 × 106 electrons have been removed from it.
D. 6.25 × 106 protons have been removed from it.
E. 6.25 × 106electrons and protons have been added to it.

Answer: The correct answer is 6.25 × 106 electrons have been removed from it.