BP is an oil and gas company that operates a commercial lease for an offshore oil drilling platform in the Gulf of Mexico.An explosion occurs on the drilling platform that kills several BP employees, and results in the release of 200 million barrels of oil into the Gulf of Mexico, resulting in about $20 billion of environmental damage to the Gulf Coast of the US.Of the thousands of oil drilling platforms active in the world, this is the first major disaster resulting from an explosion.Assuming that oil is a necessary resource for the world economy, which of the following is the best ethical system used by BP to justify operating the oil rig in the Gulf?

a.universality

b.categorical imperative

c.procedural justice

d.conventionalism