Which types of multicast distribution tree can PIM-SM use?

Which types of multicast distribution tree can PIM-SM use?
A . Only shared tree rooted at the source
B . Only shared tree rooted at the RP
C . Only shortest path tree rooted at the RP
D . Shared tree rooted at the source and shortest path tree switchover
E . Shared tree rooted at the RP and shortest path tree switchover
F .  Shared tree rooted at the first-hop router and shortest path tree rooted at the RP

View Answer

Answer: E