Which of the following are methods of advance for the Marine rifle squad?

The correct choice, which includes squad rush, fire team rush, and individual rush, accurately describes methods of advance utilized by a Marine rifle squad in various combat situations. These techniques are designed to enhance movement while minimizing exposure to enemy fire.

The squad rush involves the entire squad moving together in a coordinated manner to cover ground quickly, while maintaining suppressive fire as needed. The fire team rush is similar but focuses on pairs of Marines working together to advance while the other team provides cover. The individual rush allows for personal maneuvering, enabling a Marine to make advances independently when required, especially in scenarios where communication and movement flexibility are crucial.

Other options, such as sitting and crouching or walking and running, do not specifically address tactical movements used in combat situations. Bounding and skirmishing, while related to movement techniques, do not encompass the specific structured approaches that the selected methods include, which are tailored specifically for the dynamics of a rifle squad's operations.