Refineries are places where a substance is refined. It could be any substance, really. But, taking into consideration the options we have available, we could conclude that the specific refinery being referenced here is <em>natural gas. </em>This is a common material in plastic, DVDs and crayons, while bauxite, petroleum, and iron are never used in the manufacturing process of these everyday items.
Answer: None lol
Explanation: Sorry, I'm just dumb.
