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
An old composite restoration is to be replaced. The best method is 
Select and explain. 
A. To remove entire restoration, reetch and refill, B. To roughen the old restoration, reetch and refill, C. composite restorations cannot be replaced or refilled, D. none of the above
B: To roughen the old restoration, reetch and refill
Answer: B: To roughen the old restoration, reetch and refill 
Explanation: None