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': 'Certain oral conditions may preclude the use of the rubber dam; these conditions include: \nSelect and explain. \nA. Teeth that have not erupted sufficiently to support a retainer, B. Some third molars, C. Extremely malpositioned teeth, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Certain oral conditions may preclude the use of the\u200b rubber dam; these conditions include:\n\nTeeth that have\u200b not erupted sufficiently to support a retainer.\nSome\u200b third molars.\nExtremely malpositioned teeth.\n\nIn\u200b addition, patients suffering from asthma may not tolerate the rubber dam if breathing through the nose is\u200b difficult.\nSturdevants operative dentistry 4th edition page 446', 'role': 'assistant'}]