Once a fire fighter loses an initial 1 L (1 qt) of water, how long will it take for the body to recover?

The correct choice indicates that the body typically requires 1 to 2 hours to recover after losing an initial liter (or quart) of water. This takes into account the time needed for rehydration and the body’s physiological processes to return to a balanced state. During exertion, such as firefighting, fluid loss occurs rapidly due to factors like heat and sweat.

In a recovery scenario, the body needs adequate time to absorb fluids, restore electrolyte balance, and normalize physiological functions that may have been impacted by the dehydration. While faster rehydration is possible in some cases, a longer duration is often more representative of what is realistically required for full recovery after significant fluid loss, ensuring that the body replenishes its reserves effectively.

The other options reflect shorter recovery times that may not account for the body's need to fully process and restore lost fluids after significant exertion and hydration efforts.