Feedback from familiar customers on services/products.

• A. Honest Opinions
• B. Customer Feedback
• C. Inexpensive Business Advice
• D. More Customers

Answer: (A)

The main idea is the trustworthiness and usefulness of input you get from people you know. Feedback from familiar customers on services or products is best described as honest opinions because it implies candid, straightforward comments from people who know you or have experience with you. This kind of input is valuable for identifying real strengths and areas to improve. While customer feedback covers comments from customers in general, the emphasis here is on the reliability and openness of the remarks you receive from people you’re already connected with. The other options don’t fit: inexpensive business advice isn’t about input from users, and more customers is about growing the audience, not gathering truthful impressions.