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
Properties of fillers can be:
Fillers increases the mechanical properties of composite.
It also increases the optical properties of composite.
Increases the diagnostic sensitivity of composite.
Decrease watersorption and Polymerization shrinkage of composite. 
Select and explain. 
A. 1&2, B. 1,3,4, C. 1,2,3,4, D. 2,3
C: 1,2,3,4
Answer: C: 1,2,3,4 
Explanation: None