单选题 The nurse plans to teach a client who is receiving radiation therapy how to care for his skin at home. Which of the following should be included in the nurse's instructions?

• A. "Apply a heating pad to the area to relieve pain. "
• B. "Keep the area covered when you go outdoors. "
• C. "You may use deodorant soap if you wish to cleanse the area. "
• D. "Put baby oil on the area after each treatment to keep it from getting dry. "