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': 'The implant method of studying growth was proposed by: \nSelect and explain. \nA. Scammon, B. Borg, C. Belchier, D. Bjork', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]