Final answer:
The safe and proper practice for three hunters walking side by side is to ensure they maintain a safe distance from each other to prevent accidents and misfires.
Step-by-step explanation:
When three hunters are walking side by side hunting pheasants, the safe and proper practice is A) Ensure they maintain a safe distance from each other. This is to prevent accidents and ensure that each hunter has a clear line of sight and fire. Keeping a safe distance is a basic safety rule in hunting to avoid potential harm from misfires or accidental discharges. Practices such as B) Keeping their firearms pointed in the same direction, or C) Scattering and spreading out may also contribute to safety, provided that the hunters still maintain awareness of each other's positions. Carrying open containers of alcohol, as in D), is never advised during hunting as it compromises safety, impairs judgment, and reduces coordination, which are all crucial for a safe hunting experience.