Which of the Following Statements Is True About Coordination Complexes

Multiple Choice

Which of the following statements is true about coordination complexes?

A) When the ligands approach a transition metal ion in an octahedral field, the d_xz, d_yz, and d_xy atomic orbitals are affected the least by the ligands.
B) The metal is a Lewis base and the ligands are Lewis acids.
C) Only complexes with coordination number 6 are found in nature.
D) None of these is true.
E) All of these are true.