The best practice to avoid hitting a deer includes being extra alert at dawn and dusk in the fall, using the horn when appropriate, and slowing down at the sight of deer.
The best way to avoid hitting a deer is to: D) All of the above.
This includes being vigilant during times when deer are most active, such as dusk and dawn, particularly in the fall when deer are more likely to be on the move due to mating season and changing weather patterns.
Usage of the horn can be effective in some situations to scare deer away, but it's not always reliable.
If you see a deer near or crossing the road, always slow down and be prepared for the possibility that more deer could follow, as deer often move in groups.