A.All interfaces on the switch have been configured as access ports
B.Because it has not been assigned to any VLAN， interface gigabitethernet 0/1 does not appearin the show vlan output
C.Because it is configured as a trunk interface， interface gigabitethernet 0/1 does not appear inthe show vlan output
D.There are no native VLANs configured on the trunk
E.VLAN 1 will not be encapsulated with an 802.1q header
F.VLAN 2 will not be encapsulated with an 802.1q header

A.that interfaces Fa0/13 and Fa0/14 are in VLAN 1
B.that interfaces Fa0/13 and Fa0/14 are down
C.that interfaces Fa0/13 and Fa0/14 are trunk interfaces
D.that interfaces Fa0/13 and Fa0/14have a domain mismatch with another switch
E.that interfaces Fa0/13 and Fa0/14have a duplex mismatch with another switch