Which of the Following Is True of Paid Media

Which of the following is true of paid media? 

A)  It leverages a call to action to like brands on social media sites. 
B)  They are advertisements that can be purchased on a social network or other digital platforms. 
C)  It is the incremental exposure that a brand earns through viral engagement and interactions with the brand. 
D)  They are brand assets or objects created within social networks by an organization.