Gossip, making up 60-70% of conversations, is argued to be an important part of defining in regulating the social world.
a) social networks and friendships
b) friendships and ingroups
c)ingroups and outgroups

C)ingroups and outgroups

Explanation:

Ingroups are those individuals who belong to the same group that we identify with.This may be people with whom we share similar values, lifestyle, purpose etec such as people who are of the same race, ethnic group , same religion. Usually we have high onion of these groups and we tend to think they are better when compared to the outgroups. We may tend to even criticize the outgroup based on the values of the in-group which is when the gossip may start to kick in.

outgroups are those who are not the part of the group with which we identify. Usually we don't share similar values with these groups and we may isolate ourselves from them and not want any association.

Whom are you going to murder??