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
Migration of odontoblasts into dentinal tubules 
occurs during  __________ : 
Select and explain. 
A. Cavity preparation, B. Dehydration, C. Water irrigation, D. None of the above
A: Cavity preparation
Answer: A: Cavity preparation 
Explanation: None