A nurse practitioner is assessing a 7-year-old boy who has been brought to the clinic by his mother, ...

A nurse practitioner is assessing a 7-year-old boy who has been brought to the clinic by his mother, who is concerned about her son's increasingly frequent, severe headaches.
 
  Which of the nurse's following questions is least likely to yield data that will allow for a confirmation or ruling out of migraines as the cause of his problem?
  A)
  Does your son have a family history of migraines?
  B)
  When your son has a headache, does he ever have nausea and vomiting as well?
  C)
  Does your son have any food allergies that have been identified?
  D)
  Is your son generally pain free during the intervals between headaches?