What is a priority nursing intervention for a child diagnosed with celiac disease?

A. Encouraging gluten-rich foods (such as wheat, barley, and rye) worsens symptoms of celiac disease by triggering an autoimmune response that damages the intestinal villi, leading to malabsorption and long-term complications. B. High-fiber foods may be beneficial for general health, but the priority is eliminating gluten first. Fiber can still be provided from safe gluten-free sources such as fruits, vegetables, and gluten-free grains like rice, quinoa, and corn. C. Ensuring the child's diet is free of wheat, barley, and rye is the cornerstone of treatment for celiac disease. Strict lifelong adherence to a gluten-free diet allows the intestinal villi to heal, improves nutrient absorption, and prevents complications such as anemia, growth delays, and increased risk of intestinal malignancy. D. Lean proteins (chicken, fish, eggs, legumes) are safe and encouraged as part of a balanced, gluten-free diet. Restricting them would reduce important sources of nutrients.