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': 'Inorganic phase of the composite aids in \nSelect and explain. \nA. Increasing mechanical strength, B. Decreasing the coefficient of thermal expansion, C. reducing the polymerization shrinkage, D. all of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]