Final answer:
Sort by market structures: A - Monopoly, with unique products; B - Perfect competition, with similar products; C - Monopolistic competition, with differentiated products.
Step-by-step explanation:
The descriptions of goods given correspond to different types of market structures. Description A (Unique products without close substitutes) indicates a monopoly market structure, where a single company dominates the market and offers a product that does not have close substitutes. Description B (Similar products) points to a perfectly competitive market, which features many firms selling identical or very similar products. Lastly, description C (Differentiated products) is characteristic of a monopolistically competitive market, where many firms offer products that are differentiated from one another but serve a similar purpose.
In summary, the sorting of given descriptions by market structures would be:
- Description A: Monopoly
- Description B: Perfect competition
- Description C: Monopolistic competition
Each market structure has its own set of characteristics that define the intensity and nature of competition within it. Monopolies control the market for their unique products, perfectly competitive markets have many sellers offering identical products, and monopolistically competitive markets have several competitors offering differentiated products.