Which three statements are true about IP multicast configuration? (Choose three.)

A.
PIM sparse mode interfaces are always added to the multicast routing table in a router.

B.
PIM dense mode interfaces are always added to the multicast routing table in a router.

C.
PIM sparse-dense mode acts as PIM dense mode if an RP is not known.

D.
PIM sparse-dense mode and PIM dense mode require an RP on the network.

E.
PIM sparse mode and PIM sparse-dense mode require an RP on the network.

F.
PIM sparse mode and PIM dense mode require an RP on the network.