Answer:
1. Market control by many small firms.
2. Difficult entry.
3. Mutual interdependence.
Explanation:
An oligopolistic market structure is distinguished by several characteristics, one of which is either similar or identical products and dominance by few firms.
The characteristics of an oligopolistic market structure are;
1. Market control by many small firms.
2. Difficult entry.
3. Mutual interdependence.