Final answer:
If you begin to roll on a snowmobile, steer in the direction you want to go to regain control and reduce impact.
Step-by-step explanation:
If you lose control and start to roll when crossing, climbing, or descending a hill on a snowmobile, the most appropriate action is c) Steer in the direction you want to go. Steer firmly and try to maneuver the snowmobile back under control. Remember, the key is to remain calm and use the steering to correct your direction, rather than making sudden movements that could exacerbate the situation. It is important to avoid jumping off the snowmobile or closing your eyes, as these actions could increase the impact and likelihood of injury.