Which of the following items should be checked during a trip?

Checking tires, mirrors, and cargo covers during a trip is essential for ensuring both safety and compliance with regulations. Tires need to be inspected for proper inflation, tread depth, and any visible damage, as they are critical for traction and stability. Mirrors must be adjusted and checked to ensure optimal visibility, allowing the driver to monitor the surroundings and any blind spots. Cargo covers are important to check as well, since they help secure the load and prevent any items from falling off while on the road. This comprehensive inspection helps to maintain safety standards and ensures that the vehicle is operating effectively throughout the trip.

While the other items listed in the options are important for a vehicle’s overall maintenance, they are typically addressed before a trip rather than during it. For example, engine oil and windshield wipers are checked as part of a pre-trip inspection, but are not items that usually require attention while actively driving. Similarly, brake fluid and body paint don't affect the immediate operation of the vehicle during transit, and checking headlights and windshield fluid, while relevant, doesn’t cover the critical areas of tire safety or visibility that mirrors provide.