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 to\nnursing bottle syndrome is \nSelect and explain. \nA. Speech and esthetics, 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'}]