Which Statement by the Patient Being Discharged After Hospitalization for Urolithiasis

Which statement by the patient being discharged after hospitalization for urolithiasis indicates the need for further teaching."

A) "I should increase sodium in my diet to increase urine output."
B) "If my urine is amber, I need to drink more fluid."
C) "My urine output should be at least 2 liters per day to flush out the stones."
D) "I am not supposed to drink coffee or tea."