Interdependence of firms is most common in

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Interdependence of firms, where the actions of one firm affect the others, is most commonly seen in oligopolistic industries. In such industries, there are only a few large firms that dominate the market, and as a result, the actions of one firm can have a significant impact on the market as a whole. In monopolistically competitive industries, there are many small firms that operate independently, while monopolistic industries have only one dominant firm. Therefore, choices A and B are less likely. While interdependence may also exist in monopolistically competitive industries, it is not as pronounced as in oligopolistic ones. Hence, choice C is also less likely.

Interdependence of Firms Is Most Common in