Driving in snow requires special precautions because **tires have less grip on the road**, which increases the difficulty of braking and controlling the vehicle. For this reason, it is important to **drive slowly** and maintain a greater safety distance from other vehicles.

To start the vehicle in snowy conditions, it is recommended to choose a **gear in the gearbox** that allows the vehicle to start at a higher speed, but with little engine power. This means using a **higher gear** to prevent the wheels from skidding when applying too much engine power.

Additionally, it is crucial to avoid sudden movements and abrupt changes in speed. When going downhill, it should be done more slowly than usual, using lower gears so that the engine helps to hold the vehicle back. However, on flat surfaces or when starting, a higher gear is preferable to maintain control and avoid slipping.

Therefore, the correct option is to **drive slowly, but with the highest gear possible** to maintain control of the vehicle in snowy conditions.