Which of the following ensures that both feet can touch the ground?

The correct choice emphasizes the importance of selecting a motorcycle that is appropriate for a rider's size, ensuring that both feet can comfortably reach the ground while seated. When a bike is appropriately sized, it enhances the rider's ability to maintain balance when stationary and provides greater confidence while maneuvering at low speeds or during stops.

Choosing a bike that fits well also reduces the likelihood of issues such as strained leg muscles or an awkward riding position, which can arise from riding a bike that is too large or too small. This consideration is crucial for safety and comfort when riding.

While using a smaller bike may help some riders reach the ground, it does not guarantee the best fit for every individual. Similarly, adjusting the motorcycle might not address the rider's natural stature or body proportions effectively, and relying solely on long legs does not necessarily account for all riders, as body proportions can vary significantly. Thus, focusing on a motorcycle that is the right size for the rider brings about the best results for safe and effective riding.