Answer:
B is the correct option.
Explanation:
In theory, the perfect market is the structure in which all the firms sell identical products,They all are price takers, the market share doesn't influence the prices, firms can enter or exit the market without cost and resources are perfectly mobile. No markets are in the sphere of the perfect competition model. so they are classified as imperfect. The imperfect and perfect market is the outcome of post-classical economic thought of the Cambridge tradition.