Which method should the center hunter use when walking in a single file?

The shoulder carry method is the most appropriate choice for a center hunter walking in a single file. This method allows the hunter to keep the firearm safely pointed down and away from themselves and others in the group, reducing the risk of accidental discharge. The shoulder carry provides a stable position for the gun, as it is secured against the hunter's body, allowing for better control while navigating through various terrains.

Additionally, using a shoulder carry facilitates movement, ensuring that the hunter can easily adjust to the environment – whether stepping over obstacles or navigating through brush – without compromising the weapon's safety. Furthermore, it keeps the hunter's hands free for other tasks, such as maintaining balance or holding onto the terrain.