Which Cisco IOS XR command should be used in order to enable LDP-IGP synchronization for the ISIS IGP protocol?
A. RP/0/RSP0/CPU0:R1(config-isis-if-af)#mpls ldp sync
B. RP/0/RSP0/CPU0:R1(config-isis)#mpls ldp sync
C. RP/0/RSP0/CPU0:R1(config-ldp)#isis ldp sync
D. LDP-IGP synchronization is not supported for the ISIS IGP protocol on Cisco IOS XR platforms
