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 newly erupted tooth: \nSelect and explain. \nA. Is protected by dental plaque, B. Has an early immunity to caries, C. Has a high affinity for fluoride, D. All of the others', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]