​A Service Like That Provided by Google, Which Searches the Internet

​A service like that provided by Google, which searches the Internet but provides little original content,

A) ​is considered an aggregator.
B) ​is a not-for-profit service that others use to provide their content.
C) is considered an accumulator.
D) ​is considered an aggregator, and is a not-for-profit service that others use to provide their content.
E) ​is considered an accumulator, and is a not-for-profit service that others use to provide their content.