Answer :
Market structure is determined by the number and relative size of the firms in an industry.
- Market structure describes how different industries are categorized and distinguished based on how fiercely and in what ways they compete with one another for customers' goods and services. There are four different kinds of market structures: monopolistic competition, oligopolistic markets, perfect competition, and monopolistic markets.
- In economics, market structure illustrates how businesses are categorized and distinguished according to the sorts of items they sell and how external circumstances and elements impact their operations. It is simpler to comprehend the peculiarities of various marketplaces when there is a clear market structure.
- The four types of economic market structures are oligopoly, monopoly, perfect competition, and monopolistic competition. The following characteristics explain why the categories are different: In oligopoly, there are few producers, many in perfect and monopolistic competition, and one in monopoly.
Thus the correct answer is Option D.
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