What are the risks posed to motorcyclists by large vehicles?

Answer: B — Large vehicles make wide turns.

Large vehicles making wide turns is indeed a crucial risk for motorcyclists. When a large vehicle, such as a truck or a bus, turns, it often requires more space than one might anticipate. This can create a dangerous situation for a motorcyclist who may be positioned in an area the vehicle is turning into. The wide turning radius can result in the motorcyclist being in the path of the vehicle, leading to potential collisions. Understanding this risk encourages motorcyclists to be vigilant and maintain a safe distance when larger vehicles are near, especially at intersections or when the vehicle is signaling a turn. While large vehicles do have blind spots, they are typically larger than those of motorcycles, making option C less applicable in comparison to the significant risk posed by wide turns. Options A and D do not accurately reflect the most pressing dangers to motorcyclists. Thus, recognizing the implications of wide turns is essential for ensuring safe riding practices around large vehicles.