How often should you check the trailer's load security during transport?

Answer: C — Every two hours or during rest stops

Checking the trailer's load security every two hours or during rest stops is essential for ensuring safe transport. Loads can shift due to factors such as acceleration, deceleration, and changes in road conditions. By regularly inspecting the load, especially at intervals like rest stops, drivers can identify any shifts or potential issues before they lead to a dangerous situation on the road. This practice helps maintain the integrity of the load and ensures it does not exceed the vehicle's weight limits or become unstable. Regular checks are crucial not only for the safety of the driver but also for other road users, the stability of the vehicle, and compliance with regulations.