What must a commercial driver do before starting a long trip?

Answer: B — Conduct a pre-trip inspection of the vehicle

Before starting a long trip, a commercial driver must conduct a pre-trip inspection of the vehicle. This thorough inspection is crucial because it helps ensure that the vehicle is in safe operating condition and that all systems, such as brakes, lights, and tires, function correctly. By performing a pre-trip inspection, the driver can identify any potential issues that may lead to unsafe driving conditions or breakdowns during the trip. The pre-trip inspection process involves checking key components of the vehicle to confirm that they are maintained properly and are in good working order, contributing significantly to road safety. It is an essential practice for commercial drivers to comply with regulations and maintain safety on the road. The other choices focus on aspects that do not adequately prepare the driver for safety and compliance. For instance, checking the fuel level or reviewing the route map are important tasks but do not encompass the comprehensive safety checks required before a long journey. Loading cargo quickly could lead to unsafe load distribution and potential hazards, which reinforces the importance of prioritizing a complete pre-trip inspection over speed.