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 type of study used in the 10 year Fluoride tablets\nstudy can be also be described as a (an) \nSelect and explain. \nA. Case control study, B. Cross section study, C. Count study, D. Experimental study', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]