Which of the following options applies to virtual Ethernet devices（）

• A、A virtual Ethernet adapter can only connect to other partitions within the same system.
• B、A virtual Ethernet  adapter needs  to be connected to an external VLAN  capable switch to be able to communicate with other partitions on the same system.
• C、A partition can support an unlimited number of virtual Ethernet devices.
• D、A virtual Ethernet adapter in the VIO Server that is part of a SEA should not have the "trunk flag" set