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/are the etiological factors for ECC \nSelect and explain. \nA. At will breast feeding, B. Prolonged bottle feeding, C. Frequent use of syrupy medicines which are sweetened, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]