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 term stepping is associated with \nSelect and explain. \nA. Root canal preparation, B. direct gold condensation, C. Silver amalgam condensation, D. fracture mandible', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]