Concept:Retailers are the final link in the distribution chain who sell goods directly to consumers in small quantities.Explanation:The selling of goods in small units is normally performed by retailers.A retailer buys goods from wholesalers or distributors and sells them to the final consumers in small amounts.These small units are meant for personal use or consumption, not for resale.Wholesalers and distributors deal in bulk, while chambers of commerce are trade promotion bodies, not sellers.Answer:D. retailers