Therapeutic management of children with Hirschsprung's disease includes:

Rationale: A. A low-fiber diet is not a definitive treatment; dietary modifications may help manage symptoms but do not correct the underlying problem. B. Surgical removal of the aganglionic segment of the bowel is the primary treatment for Hirschsprung’s disease, as the affected segment lacks nerve cells needed for normal peristalsis. Postoperative care may include temporary ostomy in some cases, but definitive management requires excision of the affected bowel. C. A permanent colostomy is rarely needed; most children undergo a primary pull-through procedure. D. Nasogastric decompression and supportive medical management do not resolve the underlying defect, though they may be used temporarily preoperatively to relieve obstruction.