Final answer:
Driver inspections need to be done before each trip, known as a pre-trip inspection, to ensure the vehicle is safe and ready for use. This is to spot potential safety issues or maintenance needs and is required for each trip the vehicle takes.
Step-by-step explanation:
Driver inspections must be performed regularly to ensure safety and compliance with various regulations. The correct answer is a. Every trip. Before each trip, drivers are required to conduct a pre-trip inspection to spot any potential safety issues or maintenance needs. This is a standard procedure in the transportation industry to prevent accidents and breakdowns. The pre-trip inspection usually includes checking vehicle parts such as tires, brakes, lights, and other critical components. Additionally, drivers should do a post-trip inspection at the end of each day. While there may be additional inspections required on a quarterly, monthly, or bi-annual basis, these do not replace the necessity for daily inspections.