A system is being designed with many LPARs which will be clients of dual VIO Servers. The VIO Servers must be redundant so that, in the event of scheduled maintenance, the clients do not need to be shut down. Which of these strategies could be used to ensure that the client LPARs continue to be able to use the network in the event of a VIO Server being shut down?（）
- AImplement PowerHA SystemMirror on both VIO servers.
- BConfigure Etherchannel between the client LPARs and the two VIO servers.
- CConfigure Network Interface Backup between the two VIO servers and use each VIO server to access the network.
- DImplement Shared Ethernet Adapter failover and have all client partitions access the network through the shared adapters.