Which of the Following Statements Concerning the Stereochemistry of Polymerization

Multiple Choice

Which of the following statements concerning the stereochemistry of polymerization is correct?

A) Polymers in the atactic configuration are more likely to be crystalline solids because regular packing of the polymer chains is easier.
B) Polymers in the isotactic configuration tend to be softer and more flexible than atactic polymers.
C) In general,radical polymerization leads primarily to branched polymers in the syndiotactic configuration.
D) The percentage of chains in the isotactic or syndiotactic configuration decreases as the polymerization temperature decreases.
E) none of the above