Company.com has I/O slot constraints on two nodes that are going to be configured in an  HACMP cluster. There is room for only one Network Interface Card in each node，in addition to the built-in Ethernet port on the system planer.  The best HACMP configuration for these servers is to implement：（）  

• A、 A single adapter network using the Network Interface Card in each node
• B、 A single adapter network using persistent addresses on the Network Interface Card in each node
• C、 A dual adapter network using the internal Ethernet adapters as an non-service interface with IPAT via IP Replacement.
• D、 EtherChannel high availability for the network connections with HACMP cascading resource groups for data and application fallover