There is a network looping problem after installing some switches. The switch vendor suggested the use of
802.1d. Which of the following is the MOST probable reason the vendor made this suggestion?

A.
It is a rapid version of spanning tree that uses BPDU to detect problems

B.
It is a regular version of port mirroring that uses hellow packets to detect loops

C.
It is a simple version of spanning tree that uses BPDU to detect problems

D.
It is a rapid version of port mirroring that uses BPDU to detect problems