During the Taking of a Medical History,the Patient Who Is

During the taking of a medical history,the patient who is addicted to heroin reports he only uses the drug a few times a week.The nurse's best response that would disclose more precise information would be:

A) "OK. You only use heroin two times a week?"
B) "What do you mean when you say 'a few?'"
C) "Are you saying that in a week's time would you use heroin only two times?"
D) "Rate your weekly usage on a scale of 1 to 15."