Final answer:
The 4-way hazard lights should be used when your vehicle is disabled on the roadway. They are not generally meant to be used when backing, as this can confuse other drivers. Therefore, the correct answer is option A.
Step-by-step explanation:
The 4-way hazard lights on a vehicle are typically used in two main scenarios. Option A, when disabled on the roadway, is accurate because if your vehicle becomes inoperable or poses a risk of impeding traffic, you would turn on your hazard lights to warn other drivers of your car's presence. It helps to prevent accidents and maintain road safety.
Option C, when backing, is not generally true. Although you might use your hazard lights briefly if you're backing into a tricky spot, in regular driving situations this use can often be confusing to other drivers. Therefore, the answer to your question is option A - hazard lights are used when disabled on the roadway.
Answer: A. When disabled on the roadway
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