Which three statements are true about PIM-SM operations? (Choose three.)
A. PIM-SM supports RP configuration using static RP, Auto-RP, or BSR.
B. PIM-SM uses a shared tree that is rooted at the multicast source.
C. Different RPs can be configured for different multicast groups to increase RP scalability.
D. Candidate RPs and RP mapping agents are configured to enable Auto-RP.
E. PIM-SM uses the implicit join model.
