Answer:
The correct answer is option b.
Step-by-step explanation:
Market power can be defined as the ability of a firm or a group of firms to increase the price above the competitive level and do not lose all the demand.
The firms in a perfectly competitive market have no market power because there are a number of firms in the market. If a firm increases the price, its demand will fall to zero.
In imperfect competition though, the firms enjoy a certain degree of market power.