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': 'Reduced enamel epithelium is \nSelect and explain. \nA. Thin layer laid by ameloblasts on tooth surface after they finish formation of enamel matrix, B. Reduced epithelial enamel organ to a few layers of cells, C. Once the tip of crown emerge, the reduced enamel cuticle, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]