Which of the following may be the reason why packets from VLAN 5 do not have tags?

A trunk port on a switch allows packets from VLANs 3, 4, and 5 to pass, but only packets from VLANs 3 and 4 have tags.

Which of the following may be the reason why packets from VLAN 5 do not have tags?
A . The port PVID is 5.
B . The port PVID is 3 and 4.
C . During trunk port configuration, the port trunk permit vlan 3 4 command is configured.
D . GVRP is enabled on this port.

Answer: B