High-density polyethylene is composed of
A) primarily linear, unbranched chains of polyethylene in a close packing arrangement.
B) primarily highly branched, non-linear chains of polyethylene in a diffuse packing arrangement.
C) a mixture of polyethylene and polystyrene.
D) polyethylene with high density plasticizers added to increase density.
Answer: A) primarily linear, unbranched chains of polyethylene in a close packing arrangement.