Which type of rehearsal involves confirming the planned intent?

The correct answer, which involves confirming the planned intent, is the backbrief. A backbrief is a formal discussion that takes place after the planning phase, where subordinates present their understanding of the operation back to their leaders. This process ensures that everyone involved is aligned with the planned intent of the mission. It provides an opportunity for commanders to assess whether their intent has been clearly communicated and understood, and it allows subordinates to seek clarification on any points of confusion.

In contrast, a full dress rehearsal is a comprehensive practice of the entire operation, including all elements as they would occur during the actual execution. It is more focused on the logistics and execution of the plan rather than confirming intent.

A combined arms rehearsal incorporates discussions and reviews among various units or branches of the military and addresses how they will work together during the mission. While it certainly contributes to confirming aspects of the operation, it doesn't specifically focus on the thorough understanding of intent that a backbrief does.

The confirmation brief is typically used to articulate key planning assumptions and mission essentials back to higher leadership but may not directly assess understanding against the intent like a backbrief does. Thus, the backbrief is the type of rehearsal most aligned with confirming the planned intent.