Archofan Associates, a firm that specializes in the sale of historical artifacts, comes into possession of an antique royal crown.

Archofan Associates, a firm that specializes in the sale of historical artifacts, comes into possession of an antique royal crown. It confirms the authenticity of the crown and holds an auction to sell it. Several interested buyers participate in the auction and quote their prices. The price of the crown is raised each time a person bids until Emily, a bidder, offers an exorbitant price that no other bidder is able to match. Archofan then sells the crown to Emily. Which of the following types of auctions does this scenario illustrate?