Which command is given to open ranks?

The command to open ranks is "OPEN RANKS, MARCH." This command is specifically designed to instruct a formation, typically in military drill, to create more space between ranks. When executed properly, the first rank will take a specified number of steps forward, the second rank will take a smaller number of steps forward, and the subsequent ranks will either stand fast or take steps backward, thereby increasing the distance between all ranks and allowing for better visibility and movement within the formation.

This command is crucial during drill and ceremonies as it facilitates proper spacing for various movements, inspections, or actions that require the ranks to be well-organized and spaced out. The other options do not pertain to the specific task of expanding the ranks in a formation, focusing instead on other movements or actions that are not related to opening ranks.