The nurse is talking with a hospitalized older adult patient who reports "feeling chilly." The nurse suggests walking in the halls. What is the nurse's rationale for making the suggestion? A. Walking can distract the patient from their discomfort. B. The hallways are warmer than the patient's room. C. Walking helps to strengthen muscles, which, over time, will increase thermoregulation. D. Walking uses the muscles, which produces heat and can help to warm the patient.