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
Reduced enamel epithelium is 
Select and explain. 
A. 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
B: Reduced epithelial enamel organ to a few layers of cells
Answer: B: Reduced epithelial enamel organ to a few layers of cells 
Explanation: None