<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 21-year-old woman comes to the physician because of a 2-month history of fatigue, intermittent abdominal pain, and bulky, foul-smelling diarrhea. She has had a 4-kg 8-lb 12-oz weight loss during this period despite no changes in appetite. Examination of the abdomen shows no abnormalities. Staining of the stool with Sudan III stain shows a large number of red droplets. Which of the following is the most likely underlying cause of this patients symptoms?? A: Ulcerative colitis, B: Carcinoid syndrome, C: Amebiasis, D: Lactose intolerance, E: Celiac disease,  <response>: This is a clinical vignette describing a 21-year-old woman with a 2-month history of fatigue, abdominal pain, diarrhea, and weight loss. The key finding is the stool staining positive for fat droplets, which indicates steatorrhea or fat malabsorption. The differential diagnosis includes diseases that can cause malabsorption and steatorrhea. Ulcerative colitis and lactose intolerance would not cause steatorrhea. Carcinoid syndrome may cause diarrhea but not steatorrhea. Amebiasis can cause diarrhea but not typically steatorrhea. Celiac disease is the most likely diagnosis given the description of foul-smelling bulky diarrhea, weight loss, and stool staining positive for fat droplets, which indicates malabsorption. Celiac disease is an autoimmune reaction to gluten that damages the small intestinal mucosa leading to malabsorption.E: Celiac disease 