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
Which of the following is/are the etiological factors for ECC 
Select and explain. 
A. At will breast feeding, B. Prolonged bottle feeding, C. Frequent use of syrupy medicines which are sweetened, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: None