Which command set resolves this error?

Refer to the exhibit.

An engineer reconfigures the pot-channel between SW1 and SW2 from an access port to a trunk and immediately notices this error in SW1’s log.

Which command set resolves this error?
A . SW1(config-if)#interface Gi0/0
SW1(config-if)#no spanning-tree bpdufilter
SW1(config-if)#shut
SW1(config-if)#no shut
B . SW1(config-if)#interface Gi0/0
SW1(config-if)#no spanning-tree bpduguard enable
SW1(config-if)#shut
SW1(config-if)#no shut
C . SW1(config-if)#interface Gi0/0
SW1(config-if)#spanning-tree bpduguard enable
SW1(config-if)#shut
SW1(config-if)#no shut
D . SW1(config-if)#interface Gi0/1
SW1(config-if)#spanning-tree bpduguard enable
SW1(config-if)#shut
SW1(config-if)#no shut

View Answer

Answer: B