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 functions of myoepithelial cells may be \nSelect and explain. \nA. Initiating contraction, B. Support for the end piece during active secretion of saliva, C. Provide signals to the acinar secretary cells for c)\tstructural organization, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]