Answer:
C. It is difficult to develop accurate specifications for an item.
Step-by-step explanation:
A product can be defined as any physical object or material that typically satisfy and meets the demands, needs or wants of customers. Some examples of a product are mobile phones, television, microphone, microwave oven, bread, pencil, freezer, beverages, soft drinks etc.
Generally, these products are manufactured and distributed through different marketing channels to various wholesalers or retailers before it gets to the consumers or customers.
Hence, each product should be distinguished from another through its brand name in order to enhance easier identification by the customers.
Products should be specified by brand because it is difficult to develop accurate specifications for an item. Thus, when a supplier such as a retailer or wholesaler wishes to place an order to a manufacturer, he or she should specify the order by brand.