A Client Reports Waking Up Feeling Very Tired,even After 8

A client reports waking up feeling very tired,even after 8 hours of good sleep.What is the nurse's best action?

A) Ask for an order for sleep medication.
B) Tell the client not to drink beverages with caffeine.
C) Tell the client not to lie flat at night.
D) Ask the client whether he or she has ever been evaluated for sleep apnea.