Which three statements are correct regarding PIM-SM? (Choose three.)
A. There are three ways to configure the RP: Static RP, Auto-RP, or BSR
B. PIM-SM only uses the RP rooted shared tree and has no option to switch over to the shortest path tree
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
