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': 'Barefoot doctor term has evolved from \nSelect and explain. \nA. Greek, B. Egypt, C. Mesopotamian, D. Chinese', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]