An LSP is configured with one-to-one FRR and node protection on a Alcatel-Lucent 7750 SR. Which of the following is FALSE?
A. Each PLR signals a protection tunnel that avoids the downstream node.
B. A single protection tunnel can protect all LSPs that go through the same hop.
C. A link protection tunnel is signaled if a node protection tunnel cannot be established.
D. Protection tunnels used in this LSP are also detour tunnels.