Living Just Off the Coast of California, a Rare Dolphin

Living just off the coast of California, a rare dolphin is listed as an endangered species. a.What agency or group was responsible for studying the status of this animal, and subsequently listing it as endangered?

A) The animal would have been studied by the National Marine Fisheries Service, but would have to be listed as endangered by the U.S. a.Fish and Wildlife Service.
B) Because of its location in ocean waters, it would have been listed by CITES.
C) The National Marine Fisheries Service would list it.
D) The Convention on Biological Diversity would list it.
E) The U.S. a.Fish and Wildlife Service would study and list it.