Which three statements about the Cisco MPLS TE Fast Reroute (FRR) process are true?

(Choose three.)

A.
TE tunnels that are configured with the FRR option cannot be used as backup tunnels.

B.
TE tunnels that are configured with the FRR option can be used as backup tunnels.

C.
The backup tunnel that is used to protect a physical interface must have a valid IP address
configured.

D.
Interfaces must use MPLS global label allocation.

E.
The source IP address of use backup tunnel and the merge point (MP) should not be
reachable.