On a Remote Island, a New Animal Is Found

On a remote island, a new animal is found. It has a four-chambered heart and lungs and is endothermic. It has internal fertilization, lays shelled eggs, and nurses its young after they hatch. This animal is most likely a(n)

A) marsupial.
B) coelacanth.
C) monotreme.
D) amphibian.
E) reptile.