【单选题】
A The administrator will be prompted during configuration to define which until will use the MACmasquerade address
B The MAC masquerade address will be concurrently used by both active and standby unit
C The MAC masquerade address will only be used by the active unit. The standby unit in use thesystem's actual interfaces (s) MAC address
D The MAC masquerade address will only be used by the un.t with higher unit ID The other unit wiltuse the system's actual interface(s) MACaddress
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