What must you do to avoid endangering others by equipment or load which has fallen off your vehicle?

The selected combination is correct because it complies with the requirements to ensure safety on the roads after an incident involving fallen equipment or load. According to German traffic regulations, if parts of your vehicle or load fall off, you must first remove them if it is safe to do so, thereby preventing further hazards. Second, it's essential to secure the danger spot, which could involve using warning triangles or lights to alert other drivers. Lastly, promptly informing the road service or police is crucial to manage the situation effectively and ensure that professionals can address any potential danger. This multi-step approach helps avoid accidents and keeps traffic flowing safely.