A. It must be configured on each PE router to enable the PE routers to receive multicast traffic for this particular MVR
B. It is used to set the designated router on a link using PIM-S
C. It must be configured on the PE and CE router to enable MP-BGP to send labels for CS
D. It is used to set the router that will server as the root bridge for ST
Explanation:
Reference: https://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg/lsmmldp.html