Which of the following is NOT a form of rehearsal that a platoon leader can use?

Combat Simulation is not considered a traditional form of rehearsal for a platoon leader. In military operations, rehearsals are crucial for ensuring that all unit members understand their roles and can execute the plan effectively during an actual mission. Common forms of rehearsal used by platoon leaders include Full-Dress Rehearsal, which allows for practicing the entire operation in a realistic setting, and Key Leader Rehearsal, which focuses specifically on leaders to refine command and coordination.

While Combat Simulation can indeed be a useful training tool, it typically involves a more abstract or technology-based approach that may not engage the troops or elements in a real-world context as directly as the other rehearsal methods. Therefore, it doesn't fit within the traditional forms of rehearsal in the way that others do, making it the correct response to the question.