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': 'Filled sealants are better than unfilled due to: \nSelect and explain. \nA. High viscosity, B. High strength, C. Cotton application, D. Low abrasion', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]