What needs to be verified about the wipers and washers?

The correct answer highlights the importance of ensuring that wipers and washers are functioning properly for safe vehicle operation. When conducting a pre-trip inspection, it's essential to check that the wipers are secure, undamaged, and operate smoothly to effectively clear the windshield of rain, snow, or debris. Properly functioning wipers enhance visibility, which is critical for safe driving, particularly in adverse weather conditions.

Safety is the primary concern during a pre-trip inspection, and wipers that do not operate as intended can compromise visibility, leading to dangerous driving situations. Ensuring that they are not damaged helps prevent failure during operation.

The other choices do not address the essential operational safety requirements. For instance, wipers moving in reverse would not be functional and would hinder visibility. Manual operation may not be practical or necessary when modern vehicles often feature automatic or variable settings. Lastly, while having multiple settings can be beneficial, it is not a fundamental requirement; the key focus should be on their secure mounting, condition, and smooth operation.