Oxygen Has Atomic Number 8

Oxygen has atomic number 8.How many times must an oxygen atom be ionized to create an O⁺⁵ ion,and how many electrons will the ion have?

A) It must be ionized three times;it now has five electrons.
B) It must be ionized five times;it now has five electrons.
C) It must be ionized five times;it now has three electrons.
D) It doesn't have to be ionized;it just needs to gain five protons.
E) It doesn't have to be ionized;it already has only three electrons.