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': 'Mercury rich condition in a slow setting amalgam alloy system in a restoration results in \nSelect and explain. \nA. Accelerated corrosion, B. Fracture of the restoration, C. Marginal damage, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]