Which fluid levels should be checked during a pre-trip inspection?

During a pre-trip inspection, it is essential to check multiple fluid levels to ensure safe vehicle operation. The correct choice includes the engine oil, coolant, brake fluid, and windshield washer fluid.

Engine oil is crucial for lubricating the engine's moving parts and preventing overheating, while coolant is necessary for regulating engine temperature. Brake fluid is vital for the proper operation of the braking system, and windshield washer fluid ensures that the driver has clear visibility by allowing them to clean the windshield.

By checking these fluid levels, drivers can identify any potential issues before embarking on their trip, helping to prevent breakdowns and enhancing overall safety on the road. The other options focus on fewer fluid levels, which may leave critical components unmonitored, leading to possible vehicle malfunctions or safety hazards.