Which of the following is an example of a written guarantee?

A warranty document serves as a formal written guarantee from a manufacturer or seller regarding the quality, performance, or longevity of a product. This document outlines the responsibilities and obligations of both the seller and the buyer, typically specifying the conditions under which a consumer can claim repairs, replacements, or refunds if the product fails to meet certain standards.

Written guarantees are significant because they provide a level of assurance to consumers, enhancing their confidence in the product's reliability. In contrast, other options do not constitute written guarantees; for instance, an advertising message is promotional and may not provide any legal assurance about the product's performance. A safety warning is intended to inform users of potential hazards but does not guarantee performance. A verbal guarantee, while potentially valid, lacks the formal documentation that provides the legal backing and clarity of a written guarantee.