All of the following statements concerning molecular orbital (MO) theory are correct EXCEPT Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a the Pauli exclusion principle is obeyed. b Hund's rule is obeyed. c electrons are assigned to orbitals of successively higher energy. d a bonding molecular orbital is lower in energy than its parent atomic orbitals. e the combination of two atomic orbitals creates one molecular orbital.