A 79-year-old man with advanced heart failure and dementia is admitted with pneumonia. He has no prior documented goals of care. Which is the most appropriate first step in advance care planning?AAssume he wants full resuscitationBFocus only on antibiotic choiceCDiscuss goals of care with the patient (if capable) and his substitute decision-maker, exploring values and preferencesDWait until he deteriorates before discussing resuscitationEWrite a do-not-resuscitate order without discussionCheck my answer