Company.com has decided to implement VPN for all network traffic. How might this might affect HACMP？（）  

• A、 Only the heartbeat IP network can exist in a VPN style network.
• B、 HACMp must have separate VPN’s for all ’non-service’ and ’service’ adapter networks.
• C、 If a VPN is used for IP traffic the heartbeating must be done over disk connections.
• D、 HACMP can exist in a VPN network environment，but special considerations must be addressed.