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.