How Have Social Networking Websites Affected Social Groups

How have social networking websites affected social groups?

A) They diminish the importance of primary groups, but not secondary, groups.
B) They reinforce the importance of bureaucracies.
C) They make primary groups expand to include many more members than before.
D) They minimize the importance of secondary groups, especially those associated with shared interests or education.
E) They help people make the most of both their primary and secondary groups.