Which Description of the Mobile and Remote Access Feature Is

Which description of the Mobile and Remote Access feature is true?

A) Collaboration Edge feature that enables remote individuals to perform international calls from Jabber with a VPN connection.
B) Collaboration Edge feature that enables remote individuals to access all enterprise collaboration services using a PC within the corporate environment.
C) Collaboration Edge feature that enables remote individuals to access enterprise collaboration services via Jabber without the use of a VPN connection.
D) Collaboration Edge feature that enables remote individuals to access enterprise collaboration services via Jabber with the use of a VPN connection.