A nurse is preparing to teach about dietary management to a client who has Crohn's disease and an enteroenteric fistula. Which of the following nutrients should the nurse instruct the client to decrease in their diet?

A. Calories is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate calories to prevent malnutrition and weight loss due to inflammation, malabsorption, and increased metabolic rate. B. Protein is incorrect. Clients with Crohn's disease and enteroenteric fistula need adequate protein to promote tissue healing and prevent protein-losing enteropathy. C. Potassium is incorrect. Clients with Crohn's disease and enteroenteric fistula are at risk of hypokalemia due to diarrhea, vomiting, and fistula drainage. They need to increase their potassium intake to prevent electrolyte imbalance and cardiac complications. D. Fiber is correct. Clients with Crohn's disease and enteroenteric fistula should decrease their fiber intake to reduce intestinal motility, bulk, and gas production, which can worsen the inflammation and fistula formation.