The Nurse Has Identified a Nursing Diagnosis of Acute Pain

The nurse has identified a nursing diagnosis of acute pain related to inflammatory process for a patient with acute pericarditis. The most appropriate intervention by the nurse for this problem is to

A) force fluids to 3000 ml/day to decrease fever and inflammation.
B) teach the patient to take deep, slow respirations to control the pain.
C) position the patient in Fowler's position, leaning forward on the overbed table.
D) remind the patient to ask for the opioid pain medication every four hours.