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': 'To achieve caries reduction in adults the diet modification should be: \nSelect and explain. \nA. Rich in calcium and vitamins, B. Restrict sugars to 5 times a day, C. Restrict sugars to 6 times a day, D. Restrict in between meals sugar intake', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]