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: Dental
[{'content': 'All of the following factors alters buccinator mechanism EXCEPT \nSelect and explain. \nA. Mouth breathing, B. Thumb sucking, C. Tongue thrusting, D. None of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Habits that alter the buccinator mechanism are\n\nMouth breathing\nThumb/Finger sucking\nTongue Thrusting\nLip/Nail Biting', 'role': 'assistant'}]