Clam Oil Company drills oil and makes many products from this crude oil. When Clam Oil is deciding if they should sell the crude as-is or process it further (into gasoline, chemicals, etc.) they have the following list of costs to consider, but which of these is NOT relevant when considering if the crude oil should be processed further? 1. A variable production cost incurred prior to split-off. II. A variable production cost incurred after split-off. III. An avoidable fixed production cost incurred after split-off. Only III Only I and II Only I and III Only