you are assessing a man with suspected hypothermia. the patient is conscious, alert, and actively shivering. his respiratory rate is increased, but his breathing is unlabored, and the pulse oximeter reads 72%. the pulse oximetry reading is most likely: a.accurate because he has signs of respiratory failure. b.secondary to decreased perfusion in the extremities. c.accurate because shivering affects hemoglobin binding. d.a direct reflection of his increased respiratory rate.