What would cause this problem?

— Exhibit —

user@switch# show vlans
ws {
vlan-id 23;
interface {
ge-0/0/12.0;
ge-0/0/6.0;
}

dot1q-tunneling;
no-mac-learning;
}
— Exhibit —

Refer to the Exhibit.
Referring to the exhibit, an administrator notices that all traffic is flooded out of all the ports in
VLAN ws.
What would cause this problem?

A.
no-mac-learning is enabled on the interface.

B.
Spanning tree is disabled.

C.
dot1q-tunneling is enabled on the VLAN.

D.
Unicast destinations are flooded out of all ports.

Explanation: