All of the Following Statements on Groove's Features Are Correct

All of the following statements on Groove's features are correct except:

A) when a user changes a document,Groove automatically propagates that change to workspaces on other users' computers.
B) if two users attempt to change the same document at the same time,Groove disallows one of them until the other is finished.
C) Groove is used exclusively for synchronous collaboration as it uses multiuser text chat.
D) Groove uses Voice over IP to enable meeting participants to conduct telephone conversations.