Medical equipment sold to doctors is an instance of ______.

A．most of the products exchanged at traditional markets are consumer goods
B．most of the products bought and sold at traditional markets are industrial goods
C．most farmers lived far away form marketplaces and never sold their products directly
D．most service industries have not yet developed mature markets for their products

A．will influence the price of paper industry
B．is a product delivered to the final user
C．is a consumer product
D．is an industrial product