During an inspection, what must be examined regarding the airbag system?

The correct response focuses on the functionality of the airbag warning light, which is a vital component of the airbag system. This light serves as an indicator of the system's operational status. If the warning light does not function correctly, it may signal potential malfunctions in the airbag system, indicating that the airbags may not deploy in the event of a collision. Ensuring that this warning light is operational is essential for confirming the airbag system's readiness and safety.

Other options, while related to safety considerations, do not directly address the critical aspect of the airbag system's readiness for deployment. For instance, visible airbags do not guarantee their proper function, as hidden defects may still exist. Cleaning the airbag system is not a part of the inspection criteria; rather, it’s important that the system remains unaltered and undamaged. Lastly, inflated airbags would indicate a deployment scenario, which is not a practical measure for inspecting readiness, as airbags should only deploy during a collision.