Which of the following is NOT one of the standard rifle-firing positions?

The correct answer is "C," which identifies "Flying" as not being one of the standard rifle-firing positions. In firearm training and shooting sports, the primary positions are prone, standing, and kneeling.

The prone position involves lying flat on the ground, which offers excellent stability and support, making it ideal for precision shooting. The standing position, though less stable than prone, is commonly used in various shooting competitions and hunting situations, emphasizing balance and quick aiming. The kneeling position provides a compromise between stability and mobility, allowing shooters to adopt a lower profile while maintaining a decent shooting platform.

"Flying," however, does not correspond to any recognized or formal shooting stance. It might suggest an action or movement but does not fit within the framework of standard shooting techniques. Understanding these positions is crucial for proper shooting technique, accuracy, and safety while handling firearms.