When the RSVP LSP FRR protection is enables, which of the following statements about the original RSVP LSP are true?
A . The point of local repair (PLR) and the merge point (MP) can perceive the application of FRR but other nodes on the original RSVP LSP
B . The RESV message is sent by the MP to an upstream node through a bypass LSP after modified.
C . The PATH message is sent by the PLR to the MP through a bypass LSP after modified.
D . The MP sends the ResvTear message to the upstream node of the original RSVP LS
Answer: B, D