Final answer:
The nurse should provide more teaching about peritoneal dialysis if the patient cleans the catheter in the bathtub.
Step-by-step explanation:
Option C indicates that the nurse should provide more teaching about peritoneal dialysis (PD). This is because cleaning the catheter while in the bathtub can introduce bacteria to the catheter site, increasing the risk of infection. Patients using PD should clean the catheter exit site using sterile technique and avoid submerging the catheter in water to prevent infection.