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
Following events occur in organizing stage of amelogenesis 
Select and explain. 
A. Formation of pre ameloblast, B. Induction of odontoblast, C. Dentin formation, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None