What must you be aware of when using a prop stand?

Your answer is correct because according to German traffic rules, when using a prop stand (such as a kickstand on a motorcycle or bicycle), you must consider all three aspects:

1. The gradient of the parking place: Parking on a slope requires extra caution to ensure the vehicle does not tip over or roll away.

2. The characteristics of the ground surface: The surface should be firm and stable enough to support the vehicle without the prop stand sinking in or slipping.

3. The prop stand is completely folded away before driving off: It is mandatory to fold the stand fully to avoid accidents or damage while moving.

These points help ensure safety and prevent accidents when parking or starting to drive using a vehicle with a prop stand.