Which item is not among the bus-interior components specifically listed as needing to be in safe working condition?
Correct answer: D. – Air conditioning
The Alaska CDL manual lists every handhold and railing, the floor covering, passenger signaling devices, and emergency exit handles as parts that must be in safe working condition. It also requires seats to be secure and safe for riders. Air conditioning is not included in this particular safety-component list.
Source: Alaska Commercial Driver License Manual — § 4.1.3, “Bus Interior”

