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
[{'content': 'Relining or rebasing of complete denture is required because \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]