Concept:A retailer is the final link in the chain of distribution between wholesalers and consumers.
Explanation:The primary function of a retailer is to sell goods directly to final consumers in small quantities.
Retailers buy goods in bulk from wholesalers and then break the bulk for consumers.
They also provide services such as easy availability of goods, display of products, convenience, and sometimes after-sales support.
Banking services and hoarding services are not legitimate functions of a retailer.
While retailers may keep some stock, selling goods to consumers is their most distinct and essential function.
Answer:D. Sales services