What are the key components checked during a pre-trip inspection?

The key components checked during a pre-trip inspection focus on ensuring that the vehicle is safe and operational for its intended use. This includes verifying the condition and functionality of critical systems that directly affect vehicle performance and safety.

Brakes are essential for stopping the apparatus safely; therefore, checking their condition is imperative. Lights ensure visibility and signaling capability, which are crucial for both the driver’s safety and communication with other road users. Tires are vital for traction and handling the vehicle, and assessing their tread and pressure is necessary to prevent blowouts or loss of control. Fluid levels, including oil, coolant, and brake fluid, are important for the vehicle's overall operation and prevent mechanical failures. Mirrors aid visibility, allowing the driver to be aware of their surroundings and the position of the vehicle relative to other objects and traffic.

While fire extinguishers, GPS, communication devices, and operation of equipment like pumps may be important, they do not constitute the foundational checks that ensure the vehicle itself is ready for the road. Comfort features or accessories like seating comfort and climate control are less critical in the context of safely operating a vehicle. Therefore, option B encompasses the most crucial aspects necessary to ensure a safe and functional driving experience.