The Nurse Is Concerned That a Colleague Is Experiencing Depression

The nurse is concerned that a colleague is experiencing depression from substance abuse. What does the nurse observe to make this assumption?

A) The colleague leaves the unit and cannot be located for long periods of time.
B) The colleague uses the visitor bathroom instead of employee bathroom.
C) The colleague often eats lunch away from the hospital.
D) The colleague complains of frequent headaches at work.