【单选题】
A <{p}>huawei(config)#interface giu 0/19 Huawei (config-if-giu-0/19)hoffline-tx-off-time 0 500<{/p}><{p}><{/p}>
B <{p}>huawei(protect-group-0)hprotect-group member port 0/19/0 role work<{/p}><{p}><{/p}>
C <{p}><{strong}><{/strong}>huawei(protect-group-0)aprotect-group enable<{/p}><{p}><{/p}>
D <{p}>huawei(config)=protect-group 0 protect-target sth-nni port workmode timedelay<{/p}><{p}><{/p}>
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