In PIM-DM, which of the following processes are involved in SPT establishment?

In PIM-DM (Protocol Independent Multicast - Dense Mode), the SPT (Shortest Path Tree) establishment process involves flooding to propagate multicast traffic across the network, prune messages to stop sending multicast traffic to unwanted interfaces, and graft messages to re-establish forwarding when needed. State-refresh is not directly involved in SPT establishment but helps maintain the prune state ​.