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
Most important morphologic or histologic consideration
in cavity preparation in primary teeth is 
Select and explain. 
A. Size of primary molars, B. Thickness of enamel and dentin, C. Direction of roots below CEJ, D. Direction of enamel rods cervically
B: Thickness of enamel and dentin
Answer: B: Thickness of enamel and dentin 
Explanation: None