When riding where sand and gravel have collected on paved roads, you should:

Avoiding sudden changes in speed or direction is crucial when riding over sand and gravel because these surfaces can significantly reduce traction. Abrupt maneuvers can easily lead to losing control of the motorcycle, increasing the risk of a crash. Sand and gravel can cause the tires to slide or skid, so a smooth, steady hand on the controls is essential for maintaining stability.

Riding in a straight line while controlling your speed gently helps in navigating these hazardous conditions safely. By doing so, you allow the tires to maintain better contact with the road, thereby reducing the likelihood of slipping. Additionally, making gradual adjustments to your speed can help you stay balanced and in control, while sudden acceleration or braking might throw the motorcycle off balance.

While other options may seem like they could help in specific circumstances, they do not prioritize safety as effectively in the context of loose surfaces where traction is compromised.