Which statement best describes the Deepwater Horizon spill? It was the largest accidental marine oil spill in history, heavily damaging wildlife in the Gulf of Mexico. It involved the release of huge amounts of liquefied coal ash into the Dan River in North Carolina. It was the largest spill of industrial waste in history, polluting a major freshwater source in the Great Lakes. It involved the release of small but deadly amounts of sewage into the Great Lakes in Michigan.