A Client Says, "This Morning's Nurse Told Me That My

A client says, "This morning's nurse told me that my pain medication is a scheduled drug. Aren't all drugs given on a schedule?" How should the nurse respond?

A) "What time would you like to schedule your pain medication?"
B) "Medications are usually scheduled every 4 hours."
C) "Scheduled medications have a significant potential for abuse."
D) "During preclinical investigation, scheduled medications are tested."