Which two statements are correct about the voice VLAN feature?

Which two statements are correct about the voice VLAN feature? (Choose two.)

A.
The voice VLAN feature enables access ports to accept both tagged and untagged traffic.

B.
The voice VLAN feature requires access ports to accept untagged traffic only.

C.
The voice VLAN feature always uses the same VLAN as the data VLAN

D.
The voice VLAN feature is used with CoS to differentiate traffic.