Generally, the Octet Rule Works Fairly Well for Predicting the Behavior

Generally, the octet rule works fairly well for predicting the behavior of atoms. However, there is an exception:

A) The halogens do not form ions on the basis of the octet rule.
B) The alkali metals only conform to the octet rule when producing neutral atoms.
C) The transition metals do not necessarily conform to the octet rule.
D) The nonmetals do not conform to the octet rule.