B is correct
https://networklessons.com/cisco/ccie-routing-switching/multicast-pim-bootstrap-bsr#:~:text=BSR%20(Bootstrap)%20is%20similar%20to,is%20a%20Cisco%20proprietary%20protocol.
upvoted 1 times
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Community vote distribution
A (35%)
C (25%)
B (20%)
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2 years ago