The primary reason to disconnect vehicle power sources before rescue is to prevent:

• A. Potential ignition sources
• B. Electrical shock risk to responders
• C. Loss of radio contact
• D. Battery corrosion

Answer: (A)

The main idea is reducing ignition risk in a vehicle rescue environment. When a vehicle is crashed, flammable vapors from fuel can be present, and electrical systems can produce sparks or arcing if power remains connected or circuits are disturbed. Disconnecting power sources removes a major ignition source, significantly lowering the chance a spark or heat from the electrical system will ignite those vapors. While protecting responders from electrical shock is important, the primary goal in this scenario is to prevent ignition. Other options—such as loss of radio contact or battery corrosion—are not the main safety concern during the rescue.