In an Octahedral Complex, Electrons In $d _ { z^2 }$

Multiple Choice

In an octahedral complex, electrons in $d _ { z^2 }$ and $d _ { x ^ { 2 } - y ^ { 2 } }$ orbitals experience a greater repulsion from the lone pairs of electrons on ligands because these orbitals

A) contain more electrons than the other three d orbitals.
B) each contain one unpaired electron.
C) are oriented directly toward the incoming ligand electron pairs.
D) are located a greater distance from the metal ion nucleus.
E) are roughly spherical in shape, much like an s orbital.