The Nurse Is Working in an Intensive Care Unit and Observes

The nurse is working in an intensive care unit and observes that some clients do not respond to injections of diazepam (Valium) when the injections are given by a particular nurse. This nurse returns from lunch exhibiting slurred speech and euphoria. Which is the best action for the nurse to take?

A) Ask other nurses if they have noticed anything unusual.
B) Call the manager and report the observations.
C) Observe the nurse as injections are prepared and administered.
D) Tell the nurse, I know you've been stealing Valium.