Which of the following configuration roadmaps is correct?

To improve STP running stability, a network administrator wants to configure some STP features or protection mechanism on switches.

Which of the following configuration roadmaps is correct?
A . Configure the user access port as an edge port to prevent the user from connecting to the switch on this port.
B . Configure root protection on the user access port to ensure that the user does not connect to a switch with a higher priority.
C . Configure loop protection on positions where loops have occurred so that loops are always blocked.
D . Configure BPDU protection so that the switch checks the validity of each received BPDU to prevent attacks of forged BPDUs.

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Answer: B