A Guarantee is a promise or assurance that attests to the quality of a product that is either (1) given in writing by the manufacturer or (2) given verbally by the person selling the product. Which situation below is the best example of a Guarantee?

Given data

• A guarantee is an explicit promise (written or verbal) about quality with an implied remedy (repair/replacement/refund).

Concept/Approach
Look for a direct quality assurance statement made by the seller/manufacturer.

Step-by-step reasoning
(A) High ratings are reviews, not a seller's promise.(B) Advice to obtain a guarantee is not itself a guarantee.(C) Business description, no promise stated.(D) Seller promises a refund if quality is lacking — a clear verbal guarantee.

Verification/Alternative
The core elements (promise + remedy) appear only in (D).

Common pitfalls

• Confusing third-party ratings with a guarantee from the seller.

Final Answer
Lori's coworker offers a refund if quality is not highest — a guarantee.