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What is a breakaway cable?

  1. A type of towing cable

  2. A safety device added to the trailer braking system

  3. A tool for fixing tyres

  4. A cable used to charge the battery

The correct answer is: A safety device added to the trailer braking system

A breakaway cable is a safety device that is attached to the trailer's braking system. It is designed to engage the brakes on a trailer in the event that the trailer becomes disconnected from the towing vehicle. This helps prevent the trailer from becoming a hazard on the road and potentially causing accidents. Therefore, options A, C, and D are incorrect as they do not accurately describe the function or purpose of a breakaway cable.