How does an auction catalog benefit bidders?

An auction catalog is an essential tool for bidders because it offers detailed information about the items that will be available in the auction, including descriptions, images, conditions, and estimated values. This information allows bidders to make informed decisions about their bids, helping them to evaluate items based on their interests and budget. By understanding what each item is, its condition, and its market value, bidders can strategize more effectively for the auction and determine which items they want to pursue.

The catalog serves as a comprehensive guide, enabling bidders to familiarize themselves with the offerings beforehand, which can significantly enhance their confidence and engagement in the bidding process. Therefore, the catalog is crucial for ensuring that bidders know exactly what they are bidding on, making option C the correct answer.