The Nurse Is Instructing a Patient with Uric Acid Stones

The nurse is instructing a patient with uric acid stones on methods to prevent lithiasis. Which patient statement indicates that teaching has been effective?

A) "I should avoid organ meats and sardines in my diet."
B) "I will increase purine-rich foods in my diet."
C) "I know to avoid eating vitamin D-enriched foods."
D) "I will have to make my urine more acidic by eating cheese, cranberries, grapes, and tomatoes."