The Cluster Administrator wants to use disk heartbeats as a non-IP network. What Volume Group consideration must be accounted for prior to configuring disk heartbeats？（）  

• A、 The Volume Group major number must be the same on all nodes.
• B、 The Shared Volume Group must be created with the Big VG format.
• C、 The Volume Group must be created as Enhanced Concurrent Capable.
• D、 The "t factor" must be doubled to create the reserved area for disk hearbeats.