The group of online social communities such as virtual worlds, social networking sites and blogs where people exchange opinions is classified as?

The group of online social communities such as virtual worlds, social networking sites and blogs where people exchange opinions is classified as?

A. inbound social networks
B. outbound social networks
C. offline social networks
D. online social networks

The kind of advertising that appears while consumers are browsing internet such as search related ads, online classifieds and display ads is classified as?

The kind of advertising that appears while consumers are browsing internet such as search related ads, online classifieds and display ads is classified as?

A. inbound advertising
B. outbound advertising
C. online advertising
D. buzz advertising