When approaching a fire with an extinguisher in hand, you should always have a(n):

Having an exit route when approaching a fire with an extinguisher is crucial for personal safety and effective fire response. This ensures that you are not only prepared to engage the fire but also have a clear and safe way to retreat if the situation escalates or becomes too dangerous. Knowing your escape path allows you to act quickly and decisively without wasting time searching for a route in a moment of crisis.

While having a backup unit, portable radio, or light source can be important in some fire response scenarios, the primary focus should be on personal safety. An exit route directly addresses the immediate need to protect oneself in an unpredictable environment, which is why it is emphasized as the best option in this scenario.