After Teaching a Patient with Interstitial Cystitis About Management of the Condition

After teaching a patient with interstitial cystitis about management of the condition, the nurse determines that further instruction is needed when the patient says,

A) "I will have to stop having coffee and orange juice for breakfast."
B) "I should start taking a high-potency multiple vitamin every morning."
C) "I should call the doctor about increased bladder pain or odorous urine."
D) "I will buy some calcium glycerophosphate (Prelief) at the pharmacy."