The Nurse Is Administering Narcotics to Surgical Clients and Understands

The nurse is administering narcotics to surgical clients and understands that which characteristic is true?

A) Codeine is less potent than morphine; it will not produce an allergic reaction.
B) Codeine is less potent than morphine; it will not relieve pain as well.
C) Morphine is more potent than codeine; it will produce more adverse effects.
D) Morphine is more potent than codeine; a lesser dose will be required.