Which type of command is meant to be carried out in conjunction with another command?

The correct answer is the supplementing command. This type of command is explicitly designed to support or enhance another command, meaning it operates alongside the primary command to achieve a specific objective more effectively.

For instance, in military operations, a supplementing command can provide additional forces, resources, or logistical support that aligns with the main operational command, thus enhancing overall mission success. It emphasizes collaboration and coordination between different units or commands to strengthen their effectiveness.

In contrast, directive and combined commands may imply leadership or integration of efforts but do not necessarily denote the supportive nature that supplementing commands embody. An overriding command suggests an authority that supersedes another, which is not the focus of supplementing commands.