Which rehearsal is used to determine how a subordinate leader intends to accomplish the mission combined arms rehearsal support rehearsal back brief or confirmation brief?

The rehearsal used to determine how a subordinate leader intends to accomplish the mission is the back brief. During a back brief, subordinate leaders present their plans and understanding of the mission to their superiors, allowing for clarification and alignment on objectives and strategies. This process ensures that everyone is on the same page and ready to execute the mission effectively.