Which of the following is not consistent with the valence bond theory description of the formation of a chemical bond?

• A. Chemical bonds can form from the overlap of half-filled orbitals.
• B. Electrons forming chemical bonds are found only in quantum-mechanical atomic orbitals.
• C. Chemical bonds can form from the overlap of a completely filled orbital and an empty orbitals.
• D. The geometry of the overlapping orbitals determines the geometry of the molecule.