Answer:
The correct answer is option d.
Explanation:
An oligopoly is a market structure where there are a few producers producing homogeneous products or similar products which are close substitutes. Because of a few firms, there is a high degree of competition in the market.
The market decisions of a firm affect its rivals, so all the firms are interdependent on each other.
The firms are price makers. There is high restrictions on entry of firms in the market.
