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': 'Total-etch concept was put forth by \nSelect and explain. \nA. Nakabayhashi, B. Buonocore, C. Bowen, D. Fusayama', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]