Which is an effect of fillers in composite is:: (A) Increased thermal expansion., (B) Decreased thermal expansion., (C) Increased thermal contaction., (D) Increased polymerization shrinkage.
Answer is B. Fillers in composite
Generally between 30% to 70% by volume or 50% to 85% by weight of a composite
Benefits of Fillers
Reinforcement- compressive strength, tensile strength, modulus of elasticity (i.e., stiffness or rigidity), and toughness

Reduction of polymerization shrinkage/contraction
Reduction in thermal expansion and contraction
Control of workability/viscosity
Decreased water sorption
Imparting radiopacity