A patient tells the nurse, Everyone says we should sleep 8 hours a night. I can only sleep 6 hours, ...

A patient tells the nurse, Everyone says we should sleep 8 hours a night. I can only sleep 6 hours, no matter how hard I try. Am I doing harm to my body? Select the nurse's best response.
 
  a. Tell me about strategies you have tried to increase your total sleep hours.
  b. Lack of sleep acts as a stressor on the body and can cause physical changes.
  c. If you have really tried to sleep more, maybe you should consult your health care provider.
  d. If you function well with 6 hours of sleep, you are a short sleeper. That's normal for some people.