What is an appropriate use for a single doughnut hose roll?

A single doughnut hose roll is designed for efficient deployment of the hose, making option B the appropriate use. This method allows firefighters to quickly and easily unroll the hose for immediate use, which is essential during emergencies where time is critical. The doughnut shape helps prevent kinks and twists while deploying, ensuring a smoother flow of water when needed.

While the other options may have some relevance to hose handling, they do not utilize the specific benefits of a doughnut roll. For instance, using it for storage in a cabinet could lead to issues such as taking up more space or not being as readily accessible compared to other storage methods. Transporting hoses on a truck may not take full advantage of the ease of deployment that the doughnut roll offers. Similarly, secure long-term storage is typically better suited to other hose rolls that might provide more protection against environmental factors. Thus, the design and purpose of the single doughnut hose roll align best with the need for quick deployment, making option B the best choice.