Final answer:
The four vehicles that do not require a walk-around inspection are aircraft maintenance vehicles, airport shuttle buses, airport security vehicles, and passenger buses.
Step-by-step explanation:
The correct answer is B) Aircraft maintenance vehicles, airport shuttle buses, airport security vehicles, and passenger buses. In this question, we are asked which four vehicles do not require a walk-around inspection. A walk-around inspection is a routine check of a vehicle to assess its overall condition, such as checking for any damage or malfunctions.
Aircraft maintenance vehicles, airport shuttle buses, airport security vehicles, and passenger buses do not require a walk-around inspection because they have specific maintenance protocols and strict safety regulations in place to ensure their proper functioning and passenger safety.