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': 'The primary reason for replacing teeth destroyed due\nto nursing bottle syndrome is: \nSelect and explain. \nA. Speech and aesthetics, B. Form and function, C. Incising and mastication, D. Arch perimeter requirements in the transitional dentition', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]