National Driver Training Level 1 Practice Test – Prep, Study Guide & Practice Exam

The anti-lock braking system (ABS) light serves an important diagnostic function in a vehicle. Upon starting the vehicle, the ABS light typically illuminates briefly as part of the system's self-check process. This indicates that the vehicle's onboard computer is performing a check of the ABS components to ensure everything is functioning correctly. If the ABS light turns off after this check, it generally signifies that the system is operational and ready for driving.

Option C correctly reflects this process because it notes that the light should be on for a moment before the vehicle is deemed ready. This momentary illumination helps drivers understand that the system is currently engaged in its initial checks. If the light remains on after the vehicle has started, it can indicate a potential issue or malfunction within the braking system that may need attention.