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
Purpose of cavity preparation is 
Select and explain. 
A. To receive restorating material, B. To cleanse the caries, C. To remove bacteria, D. None
A: To receive restorating material
Answer: A: To receive restorating material 
Explanation: None