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
Before radiotherapy tooth is removed prophylactically in order to avoid: 
Select and explain. 
A. Radiation caries., B. Radiation pulpitis., C. Osteoradionecrosis., D. All of the above.
D: All of the above.
Answer: D: All of the above. 
Explanation: None