6. Low-density polyethylene, used to make plastic films, is made by the radical polymerization of ethene, and is one of the hardest plastics to recycle. It gets its name O A. from the process by which it's polymerized. B. from the spaces left between chains when the polymer is formed. C. because it's strong but flexible. O D. because of the way the chains pack like spaghetti, close and tight.