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': 'Overbites must be reduced during the first stage of class II / I treatment to: \nSelect and explain. \nA. Prevent traumatic overbite, B. Disengage buccal cusps, C. Allow lower space to close, D. Permit full overjet reduction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]