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
The reason for sealing caries during cavity preparation is: 
Select and explain. 
A. To eliminate the need for eventual direct pulp capping, B. Produce an aseptic field when pulp exposure is inevitable, C. To allow the formation of secondary dentin before excavation, D. To produce a hard surface as a foundation for subsequent restoration
C: To allow the formation of secondary dentin before excavation
Answer: C: To allow the formation of secondary dentin before excavation 
Explanation: None