A Perioperative Nurse Is Educating Surgical Clients on Postoperative Pain

A perioperative nurse is educating surgical clients on postoperative pain control. Which statements made by the nurse regarding PCA are true?

A) The best results for PCA occur when the client can administer a bolus every 5 to 10 minutes.
B) The best results for PCA occur when the client can administer a bolus every 30 to 60 minutes.
C) When clients are in control and know they can get more immediate pain relief by pushing a button, they are more relaxed.
D) In the first 24 hours after surgery, the client has the greatest need for pain control.