Which of the following statements is correct regarding PIM Sparse Mode operations?

A.
Receivers are “registered” with RP by their first-hop router

B.
It supports shared trees only assuming all hosts want the multicast traffic

C.
From the RP, traffic flows down a Source Tree to each receiver

D.
It does not support all underlying unicast routing protocols like BGP

E.
Receivers are “joined” to the Shared Tree (rooted the rp) by their local Designated Router (DR)