单选题Which spanning-tree command would cause a PortFast-enabled interface to lose its PortFast-operational status and disable BPDU filtering if it receives BPDUs？（）Aspanning-tree guard rootBspanning-tree portfast bpduguard defaultCspanning-tree bpduguard enableDspanning-tree bpdufilter enableEspanning-tree portfast bpdufilter default
单选题
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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