Which of the following statements regarding PIM-DM is false?

Which of the following statements regarding PIM-DM is false?
A . PIM-DM stands for Protocol Independent Multicast-Dense Mode. It is a dense-mode multicast routing protocol.
B . PIM-DM assumes that each subnet on a network has at least one receiver station interested in the multicast source.
C . PIM-DM uses the graft mechanism to restore multicast packet forwarding proactively.
D . PIM-DM does not have periodic flood-prune processes.

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Answer: D