During the Admission Assessment the Patient States, "I Am Allergic

During the admission assessment the patient states, "I am allergic to morphine." Which response by the nurse is the priority?

A) "I will note this on your chart and we will be sure not to use this if you are in pain."
B) "I will ask your doctor to prescribe diphenhydramine, which will allow us to administer morphine safely."
C) "What medication can you take for pain that you are not allergic to?"
D) "What symptoms did you experience when you were given morphine?"