20 POINTS PLEASE HELP Im not good at these

Which sentence correctly uses commas to enclose nonessential elements?

A. Ned is studying wildlife, on the Galápagos Islands an 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.