Which type of command is utilized to enhance a drill command?

The correct choice, which refers to using a supplementing command, is key in enhancing a drill command because it adds more depth or specificity to the initial command given. A supplementing command reinforces or clarifies the action to be taken, ensuring that all personnel understand not only what to do but also how to execute the command effectively.

By providing additional information, a supplementing command can improve synchronization among soldiers. This is particularly important in a military context where precision and clarity can significantly affect performance and cohesion during drills or actual operations.

In contrast, other types of commands serve different purposes. For example, a combined command merges two separate commands into one, while a directive command gives specific instructions for action but may not necessarily enhance or add context. A preparatory command indicates that an action is about to follow, which is different from enhancing an existing command. The supplementing command specifically aims to provide additional clarity or context, making it the most appropriate choice in this scenario.