I think you forgot to add the options but based on my research the correct answer is "It's half on one or two dozen of another." This misquoted idiom from "daughter of invention" is intended to mean that it makes no difference to her. Thank you for posting your question. I hope that this answer helped you. Let me know if you need more help.
Semicolons should not be used between a dependent clause and an independent clause.
Answer: so I think this may be the actual answer if not oops
The correct answer is
(B) ethylene-vinyl chloride
Explanation:
vinyl chloride. noun. a colourless flammable gaseous unsaturated compound made by the chlorination of ethylene and used as a refrigerant and in the manufacture of PVC; chloroethylene; chloroethene.