Which Cisco IOS XR command should be used in order to enable LDP on all interfaces for which the IGP protocol is enabled?
A. RP/0/0/CPU0:R1(config-ospf)#mpls ldp auto-config
B. RP/0/0/CPU0:R1(config-ospf)#mpls ldp interface all enable
C. RP/0/0/CPU0:R1(config-ospf)#enable all
D. RP/0/0/CPU0:R1(config-ldp)#enable all
