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': 'Compared with dental alloys, CERAMICS show \nSelect and explain. \nA. High ductility, B. High hardness, C. Low esthetic value, D. Susceptibility to brittle fracture', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]