The postpartum nurse is assessing a client who gave birth by cesarean section 5 hours ago and is requesting pain medication. The client appears restless, has a heart rate of 110/min, and admits to recent onset of anxiety. What priority action should the nurse take?
A. Assess for lower extremity warmth and redness
B. Instruct the client in relaxation breathing techniques
C. Obtain oxygen saturation reading by pulse oximeter
D. Offer the client prescribed PRN pain medication