Amiddleman refers to a. a person or firm whose sole responsibility is bringing a buyer to the last link in the distribution chain. b. a person or firm whose sole responsibility is to find distributors for a manufacturer's products. c. any intermediary between a manufacturer and end-user markets. d. a person or firm that takes possession of a product and in some way alters it before passing it on to ultimate consumers. e. an intermediary who sells to ultimate consumers.