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': "Bruxism should be treated by night guard using: \nSelect and explain. \nA. Hawley's retainer, B. Occlusal splint, C. Double occlusal splint, D. All of the above", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]