To Prevent the Recurrence of Renal Calculi,what Should the Nurse

To prevent the recurrence of renal calculi,what should the nurse teach the patient to do?

A) Avoid all sources of dietary calcium.
B) Drink fluids such as cranberry juice and colas,which will acidify the urine.
C) Maintain fluid intake at 3000 mL a day,especially when physically active.
D) Empty the bladder every 2 to 4 hours to prevent urinary stasis and precipitation of urates.