Which of the following is an example of a combined command?

The correct answer, "At ease," is an example of a combined command because it consists of more than one action that soldiers must understand and execute as a unit. In military contexts, a combined command typically includes specific instructions that involve multiple elements of movement or position for the troops.

In this case, "At ease" instructs soldiers to maintain their current position while allowing them to relax and not stand attentively. It implies a mental shift without actual movement, emphasizing the transition from a position of strict attention to a more relaxed state while still being ready to respond.

The other options consist of commands that are more straightforward actions. For instance, "Attention" and "Forward march" are single commands that direct specific, immediate behaviors, while "Fall out" instructs soldiers to leave their formation but does not combine multiple actions or states in the way that "At ease" does. Therefore, understanding the nuances in command structure helps grasp why "At ease" stands out as a combined command.