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: Surgery
Treatment for idiopathic bone cavity is : 
Select and explain. 
A. Opening and induce bleeding by scraping, B. Marsupialization, C. Enucleation, D. No treatment is required
A: Opening and induce bleeding by scraping
Answer: A: Opening and induce bleeding by scraping 
Explanation: None