Which two statements about transparent bridging operations are true? (Choose two.)

Which two statements about transparent bridging operations are true? (Choose two.)
A . A bridge builds its MAC address table dynamically using the spanning-tree protocol.
B . A bridge operates at the data link layer.
C . A bridge sends unknown unicast frames out on all ports except the incoming port.
D . A bridge forwards traffic based on the destination IP address.
E . All the ports on the bridge belong to the same collision domain.

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Answer: B,C