Final answer:
First responders should begin assessing a situation while en route to the scene. This enables them to be mentally prepared and respond effectively upon arrival.
Step-by-step explanation:
The question seems to be related to the initial assessment procedures performed by first responders, often referred to as scene size-up or primary survey. The correct answer is that the Scene Protection (SPs) should start accessing a situation c. while en route to the scene. This approach is essential for ensuring that they are mentally prepared for what they will encounter, helping to facilitate quicker and more efficient responses once they arrive.
Examples in other contexts where preparation or anticipation is vital include:
- A person standing up from a seated position, where they must assess their balance and surroundings before action.
- A car accelerating while driving, which requires the driver to observe conditions and potentially other vehicles' actions.