Which sentence correctly uses commas to separate items in a list?
The Library of Congress is home to the world's most extensive comic-book collection, oldest original newspaper collection and, most abundant collection of cartographic items.
The Library of Congress is home to the world's most extensive comic-book collection oldest original newspaper collection and most abundant collection of cartographic items.
The Library of Congress is home to the world's most extensive comic-book collection, oldest original newspaper collection, and most abundant collection of cartographic items.
The Library of Congress is home to the world's most extensive comic-book collection, oldest original newspaper collection and most abundant collection of cartographic items.
