When at PORT ARMS, what foot should the command of execution be given for RIGHT SHOULDER ARMS?

The command of execution for RIGHT SHOULDER ARMS is given on the right foot. This is in accordance with the Marine Corps drill and ceremonial procedures, which outline that movements are often initiated with the dominant side of the body to ensure proper execution and stability. By stepping off on the right foot, it allows for synchronized movement and enhances the overall coordination of the unit.

The other choices do not align with standard drill practices, as starting on the left foot, center foot, or either foot does not conform to the specific execution protocol for this maneuver. Thus, the emphasis on the right foot is critical for maintaining discipline and precision in drill movements within the Marine Corps.