The correct answer would be, Oligopolistic, collusion.
Companies under Oligopolistic market structures are independent.
Collusion is a secret agreement among companies that may result from this interdependence.
Explanation:
Oligopolistic market is a market structure, where there are small number of sellers in a specific industry, but these are the big large sellers that capture the whole industry.
Companies under this market structure are independent. They do not depend upon each other to sell their products, rather they manufacture and sell their products independently.
Collusion is a secret agreement among the companies that may result from interdependence. In this secret agreement, companies in oligopoly may secretly sign a contract or agreement to set an output level for a market to maximize their profits.
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