The Nursing Plan of Care for a Patient in Pain

The nursing plan of care for a patient in pain should include which strategy?

A) Administer pain medication when the patient reports pain of at least a level of 4 out of 10.
B) Administer pain medications around the clock.
C) Administer pain medication when the nurse perceives the patient to be in pain.
D) Administer pain medication only when patient states a need for pain relief.