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': 'Burnishing of dental amalgam restoration does NOT \nSelect and explain. \nA. reduce surface microporosity, B. reduce creep, C. improve the marginal seal, D. reduce polishing time', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]