A Patient States, "I Am in Such Pain

A patient states, "I am in such pain. Do you think I might have fibromyalgia?" Which response by the nurse is indicated?

A) "Have you been in pain over 2 months?"
B) "You must stop smoking before a diagnosis of fibromyalgia can be made."
C) "Have you considered having the blood test for fibromyalgia?"
D) "In which areas do you have pain?"