This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'A small amount of atropine is added to diphenoxylate in order to : \nSelect and explain. \nA. Suppress associated vomiting of gastroenteritis, B. Augment the anti–motility action of diphenoxylate, C. Block side effects of diphenoxylate, D. Discourage overdose and abuse of diphenoxylate', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]