Chevren Company drills for oil, and delivers it to refining companies. Currently it is selling its crude oil at $20/barrel. Chevren has been asked to refine the oil for commercial use. For a standard of refined oil, Chevren will be paid $30/barrel. Chevren estimates that the additional labor and refining cost involved in further processing of a barrel of oil is$6/barrel. Chevren Company should A continue selling crude oil at $20/barrel B. sell refined oil for an increased profit of $4/barrel C. sell the super crude oil to another company for $21/gallon D. do none of these