Refer to the exhibit. The output that is shown is generated at a switch. Which three of these statements are true? （）

• A、All ports will be in a state of discarding, learning, or forwarding.
• B、Thirty VLANs have been configured on this switch.
• C、The bridge priority is lower than the default value for spanning tree.
• D、All interfaces that are shown are on shared media.
• E、All designated ports are in a forwarding state.
• F、The switch must be the root bridge for all VLANs on this switch.