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': 'Predictable compliment of optimum tooth preparation should satisfy \nSelect and explain. \nA. Biological requirement, B. Esthetic requirement, C. Combination of compromises among the prevalency biological and mechanical considerations, D. Biological, mechanical and esthetic requirement', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]