A New Compound, Vitellium Oxide, Has Been Discovered

A new compound, vitellium oxide, has been discovered. X-ray crystallographic studies reveal that it has a cubic unit cell with a vitellium ion at each of the corner lattice points, a vitellium ion at the geometric center of the unit cell, and an oxide ion in the center of each of the cube faces in the unit cell. Based on this structure, the correct formula should be

A) Vi₃O
B) Vi₃O₂
C) ViO
D) Vi₂O₃
E) ViO₃