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': 'Which of the following is not a consideration for obtaining a resistance form during cavity preparation? \nSelect and explain. \nA. Stress patterns of teeth, B. Direction of enamel rods, C. Designing outline form with minimal extension, D. Dovetail preparation of restoration to occlusal loading', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]