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 selection of a pulp protecting agent does not depend on: \nSelect and explain. \nA. Remaining dentin thickness, B. Choice of restorative material, C. Symptoms of the patient, D. Stage of tooth development', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The base is selected according to:\n\nDesign of the cavity\nType of permanent restorative material used\nProximity of the pulp to the cavity walls', 'role': 'assistant'}]