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': 'Disadvantage of shoulder finish line is \nSelect and explain. \nA. It is less conservative, B. It is difficult to prepare, C. Doesn’t Provide bulk of material, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]