User reviews are often _________ sources of reputation for websites that offer products or services.

• A. Unreliable
• B. Hidden
• C. Irrelevant
• D. Helpful

Answer: (D)

User reviews are often helpful sources of reputation for websites that offer products or services. They come from real customers and share concrete experiences—what went well, what didn’t, and how the product or service performed over time—so prospective buyers can judge quality and trustworthiness beyond marketing claims. While some reviews can be biased or fake, the overall pattern of many independent opinions tends to provide a valuable signal. The other options don’t fit because they mischaracterize the typical role reviews play: unreliability suggests the opposite of what reviews usually provide, hidden implies they aren’t visible, and irrelevance means they don’t inform about the product or service, which they generally do.