Which of the following is the best reason for pouring a condensation impression material a
A.the degree of polymerization of condensation polymers is initially high and then decreases with time
B.evaporation of a volatile by-product causes shrinkage ofthe set material
C.If left unpoured,condensation impression materials expand as they absorb water from air
D.condensation polymers will start to react with the polymer of the impression tray and cause distortion