island chain in the Pacific Ocean, to earn his degree.
B) Ned is studying wildlife on the Galápagos Islands, an island chain in the Pacific Ocean, to earn his degree.
C) Ned is studying wildlife on the Galápagos Islands, an island chain, in the Pacific Ocean to earn his degree
D) Ned is studying, wildlife on the Galápagos Islands, an island chain in the Pacific Ocean to earn his degree.