When a bridge transmits an Ethernet frame, the Ethernet frame has （）.

A.the broadcast address for the its source address

B.the bridge's LAN address for its destination address

C.the bridge's LAN address for its source address

D.none of the above

对因工作需要一次性进入机场控制区的人员，凭（）出具的证明信，经（）审查合格后为其办理一次性通行证。