What type of firearm typically fires cartridges that contain a single projectile called a bullet?

The correct choice refers to firearms like rifles and handguns, which are designed to fire cartridges that contain a single projectile known as a bullet. These firearms are characterized by their rifled barrels, which impart a spin to the bullet, improving accuracy and distance when firing.

Rifles and handguns are typically used for various shooting activities, including hunting and target shooting. The single bullet fired from these types of firearms allows for precision shooting, making them effective for hitting targets at longer distances compared to other firearm types.

In contrast, shotguns, which are not the correct answer, are designed to fire a shell containing multiple small pellets (commonly referred to as shot) or a single slug, but they do not typically fire a single bullet. Revolvers are a type of handgun but do not encompass all guns classified in the correct answer. Machine guns can fire multiple rounds in quick succession, often utilizing cartridges that may contain multiple projectiles, but they do not exclusively fire single projectiles. Understanding these distinctions helps clarify why rifles and handguns are the correct choice in this context.