What Criteria Does the Author Mean When She Says That

What criteria does the author mean when she says that "no multiplayer social game could meet that criterion at all times"?

A) Games must be mostly or partially free for all players at all times but can charge if players want to spend money on specialty content.
B) Games must be entirely free of racist discourse in order to be culturally important or socially productive, in short, to be "good."
C) Games must be completely free of visually disturbing imagery and content.
D) Games must limit the amount of violence and must always keep their content appropriate for all audiences.