How do content curation sites differ from other social network sites?

A) They generate new content on a regular basis
B) They replace traditional advertising and communication efforts
C) They focus on rewarding customers for use
D) They let communicators guide readers or followers to carefully chosen selections of existing materials
E) They allow customers to talk about themselves and their interests

D
Explanation: D) In many fields of business, so much original content is already available that sometimes the biggest value a communicator can offer audiences is guiding people to the best of what's out there, rather than creating new content.