A Patient with a History of Chronic Obstructive Pulmonary Disease

A patient with a history of chronic obstructive pulmonary disease has a living will that states he does not want endotracheal intubation and mechanical ventilation as a means of respiratory resuscitation.As the patient's condition deteriorates,the patient asks whether he can change his decision.Which response by the nurse is best?

A) "I'll call your physician right away so he can discuss this with you."
B) "You have the right to change your decision about treatment at any time."
C) "Are you sure you want to change your decision?"
D) "We must follow whatever is written in your living will."