In Hospices,medical Staff Base Pain Control on Which Two Techniques

In hospices,medical staff base pain control on which two techniques?

A) adjusting the dosages until the patient is pain-free, and giving the next dose before the previous dose has worn off
B) giving the patient only enough drugs to reduce the pain, and waiting until the patient shows signs of pain before giving the next dose
C) teaching the patient to overcome chronic pain without the use of drugs, and using drugs only when acute pain becomes severe
D) giving the patient a low dosage to overcome chronic pain, and providing the patient with drugs so that he/she can adjust dosages for his/her comfort