Social Bookmarking Sites Differ from Social News Sites in That

Social bookmarking sites differ from social news sites in that:

A) the objective of social bookmarking sites is to allow users to collect,save,and share interesting and valuable links.
B) social bookmarking sites allow users to edit the stories to ensure that the information posted is accurate.
C) users of social bookmarking sites can decide the content they want to promote on a given website by voting.
D) social bookmarking sites allow consumers to use them as location-based social networking sites.