When making a progress hose lay, gated wyes or tees should be inserted:

In the context of making a progressive hose lay, the correct approach involves placing gated wyes or tees every 300 feet. This practice is essential for several reasons. First, it allows for the efficient division of water supply, enabling multiple lines to be fed from a single main line without compromising pressure. By spacing the wyes or tees at regular intervals, such as every 300 feet, it ensures that firefighters have ready access to water and the capability to establish additional attack lines as necessary.

This spacing is particularly important in wildland firefighting, where the terrain can be unpredictable and conditions may change rapidly. It provides flexibility to adapt to the fire’s behavior and other incident needs while maintaining operational efficiency.

While the other choices suggest variations that might seem reasonable in specific circumstances, they don't establish a standard practice that guarantees the optimum efficiency of the hose lay system, which is why the established interval of every 300 feet is the best practice.