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
Following intracoronal bleaching immediate composite restoration required, what has to be done: 
Select and explain. 
A. Treat with catalase, B. Wait for 7 days is mandatory, C. Treat with H2O2 for 3 minutes, D. Not possible
A: Treat with catalase
Answer: A: Treat with catalase 
Explanation: None