Answer:
The correct answer is option c.
Explanation:
An oligopoly is a market structure where there are a few sellers. These sellers may be selling homogenous or differentiated products.
There is high competition in the market. The sellers are interdependent on each other.
This interdependence happens because of a few sellers. The decisions of a seller affect its rivals. So before making a decision regarding price and output, a firm must consider the reaction of its rivals.
So all the firms are mutually interdependent.