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': 'Recording posterior palatal seal is important for : \nSelect and explain. \nA. Retention of the denture., B. Stability of the denture., C. Support of the denture., D. All of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]