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 higher the Hg alloy ratio in dental amalgam: \nSelect and explain. \nA. Higher the strength, B. Lower the creep value, C. More matrix material formed, D. More gamma I phase formed', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]