Which three possible misconfigurations can occur on the backbone IGP section of an MPLS Layer
3 VPN setup? (Choose three.)

A.
configuring the LDP router ID with an incorrect loopback interface

B.
configuring the wrong AS number on a client eBGP peering

C.
configuring the wrong area number on a PE-CE OSPF link

D.
decreasing the MPLS MTU

E.
disabling MPLS on a core link

F.
disabling MPLS LDP sync in the IGP routing process