When the RSVP LSP FRR protection is enables, which of the following statements about the original RSVP LSP are true?

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