Which of the following sentences is punctuated correctly?
A.
The ocean, floor contains mountains canyons and plains even larger than those on land
B.
The ocean floor contains mountains, canyons, and plains even larger than those on land.
C.
The ocean, floor contains mountains, canyons, and plains even larger than those on land
D.
The ocean, floor contains mountains canyons and plains even larger than those on land.