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': 'Which of the following is the ultimate goal of dental\nepidemiology? \nSelect and explain. \nA. Control of dental diseases, B. Description of dental diseases, C. Development of indices for dental diseases, D. Identification of dental diseases', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]