The correct answer is B. Legal business forms, listed in order from fewest to greatest in number, are comprised of the monopolist, oligopolist, and competitor.

A monopolist is a term that refers to a single supplier or producer of a particular product or service.

An oligopoly can be referred to as a market structure with few suppliers or producers and in which they can influence the prices of products and services in the market.

A competitor is an individual selling or producing similar products as another but having control over their production procedures and prices.

A legal business listed from the smallest must start from the one supplier, then to an increased number of suppliers, and later to the largest number, including the competitors of the product in the market.