Polymerization Reactions Are Thermodynamically Favorable (Exothermic)because
A) Large Molecules Are $\pi$

Polymerization reactions are thermodynamically favorable (exothermic) because

A) large molecules are more stable than small ones.
B) polymers precipitate,which shifts the equilibrium.
C) a sigma bond is more stable than a $\pi$ bond.
D) crosslinking stabilizes the product.
E) alkenes are too unstable to store.