Which two statements are true about voice VLANs？（）
- AVoice VLANs are only used when connecting an IP phone and a host to distinct switch ports
- BAccess ports that are configured with voice VLANs will always trust the CoS that is received from IP phones
- CAccess ports that are configured with voice VLANs may or may not override the CoS value that is received from an IP phone
- DVoice VLANs are configured using the switchport voice vlan vlan-ID interface configuration command
- EVoice VLANs provide a trunking interface between an IP phone and an access port on a switch to allow traffic from multiple devices that are connected to the port
- FEnabling Voice VLAN on a switch port will automatically configure the port to trust the incoming CoS marking