Which configuration can a network engineer use to establish high availability for LDP in an MPLS setup?

A.	mpls ldp graceful-restart graceful-restart forwarding state-holdtime 180 graceful-restart reconnect-timeout 15 interface HundredGigE0/4/0/0
B.	mpls ldp graceful-restart graceful-restart forwarding state-holdtime 180 graceful-restart reconnect-timeout 15
C.	mpls ldp session protection for peer_acl duration 60 ipv4 access-list peer_acl 10 permit ip host 192.168.10.1 any
D.	router ospf 1 mpls ldp sync mpls ldp igp sync delay 30
E.	mpls ldp router-id loopback0 discovery hello holdtime 15 discovery hello interval 5