The Formal Charge on the Phosphorus Atom in a Resonance

The formal charge on the phosphorus atom in a resonance structure for the phosphate ion (PO₄^3-) that minimizes the formal charges is __________ and phosphorus has _________ valence electrons.

A) 0; 8
B) +1; 8
C) +3; 8
D) 0; 10
E) +1; 10