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
Inorganic phase of the composite aids in 
Select and explain. 
A. Increasing mechanical strength, B. Decreasing the coefficient of thermal expansion, C. reducing the polymerization shrinkage, D. all of the above
D: all of the above
Answer: D: all of the above 
Explanation: None