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: Pathology
[{'content': 'Bruxism is characterized by: \nSelect and explain. \nA. Increased mobility of the teeth, B. Radiographic widening of the pdl, C. Morning pain in muscles, D. All the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]