單項(xiàng)選擇題

Which spanning-tree command would cause a PortFast-enabled interface to lose its PortFast-operational status and disable BPDU filtering if it receives BPDUs?()

A.spanning-tree guard root
B.spanning-tree portfast bpduguard default
C.spanning-tree bpduguard enable
D.spanning-tree bpdufilter enable
E.spanning-tree portfast bpdufilter default

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