Switch A is configured with VLAN 105 and 106. Switch B is configured with VLAN 105 and 107.
Both switches are connected with a fiber cable. In order for packets from all VLANs to cross the fiber cable, which of the following configurations MUST be present?

A.
Reverse ARP

B.
Full duplex on the fiber link

C.
PoE

D.
802.1q trunking