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
Relining or rebasing of complete denture is required because 
Select and explain. 
A. Denture base material abrades, B. Ridge resorption is a continuous phenomenon, C. It prolongs the useful Life of the denture, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None