What must you check before starting your vehicle?

Answer: B — The vehicle’s pre-trip inspection checklist

Before starting your vehicle, it is essential to check the vehicle’s pre-trip inspection checklist. This checklist is a systematic way to ensure that everything is in proper working order before you hit the road. It covers critical safety and operational aspects of the vehicle, including lights, brakes, tires, and fluid levels. By following this checklist, you can identify potential issues that could lead to safety hazards or breakdowns while driving. In contrast, focusing solely on fuel level, tire pressure, or engine oil level, while important, does not encompass the comprehensive safety evaluation that the pre-trip inspection checklist provides. These specific checks are part of the broader inspection process but do not alone ensure the overall safe operation of the vehicle. The pre-trip inspection is designed to help drivers catch issues early and promote safer driving practices, which is crucial for any commercial driver.