Which of the following techniques is used to record and display results of war-gaming?

The synchronization matrix is the correct technique for recording and displaying the results of war-gaming. This tool is essential in the military decision-making process as it helps to organize and visualize how different elements of operations or plans align over time. The synchronization matrix captures the timing, responsibilities, and interactions of various components, which are crucial for understanding the overall operation's flow and coordination among units.

By using a synchronization matrix, planners can clearly see how different tasks, phases, and actions intersect, allowing them to assess the feasibility of the plan and make adjustments as necessary. This helps ensure that all components work together effectively and that there are no gaps or overlaps in responsibilities.

In contrast, while techniques like the decision brief, action log, and operational timeline serve important roles in the planning and execution phases, they do not specifically focus on the detailed display of interactions and synchronization of activities as the synchronization matrix does. The decision brief summarizes the commander's intent and key aspects of the operation, the action log captures specific actions and decisions made during the planning, and the operational timeline illustrates the sequencing of events. Each serves its function within the decision-making process but does not fulfill the specific role of recording and displaying war-gaming results as effectively as the synchronization matrix.