Which of the following describes the insignia for a Lance Corporal?

The insignia for a Lance Corporal in the Marine Corps is represented by one stripe. This rank is a step above Private and reflects a level of responsibility, indicating that the individual has advanced in their military career. The insignia of one stripe effectively symbolizes the foundational recognition of the Lance Corporal's role within the structure of the Marine Corps.

In contrast, other choices depict insignia for ranks at different levels. One stripe over crossed rifles signifies the rank of Corporal, while two stripes and three stripes represent higher ranks, specifically Sergeant and Staff Sergeant, respectively. Understanding these distinctions is crucial for recognizing the hierarchy and responsibilities associated with each rank within the military.