Which of the following are shared distribution tree characteristics()

A.Memory requirements are higher for shared distribution tree than for source distributiontree.

B.Creates a tree from a central RP to all last-hoprouters.

C.Uses a rendezvous point.

D.An optimal path is created between each source router and each last-hoprouter.

E.Place（S，G）entry in each router’smulticast routing table.

F.Place（*，G）entry in a router’smulticast routing to table.