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
Answer: A,C,D