Oligopoly differs from perfect competition and monopolistic competition in that

A) barriers to entry are lower in oligopoly industries than they are in perfectly competitive and monopolistically competitive industries.

B) demand and marginal revenue curves are more useful for analyzing oligopoly than they are for analyzing perfect competition and monopolistic competition.

C) because oligopoly firms often react when other firms in their industry change their prices, it is difficult to know what the oligopolist's demand curve looks like.

D) the concentration ratios of oligopoly industries are lower than they are for perfectly competitive and monopolistically competitive industries

Oligopoly differs from perfect competition and monopolistic competition in that because oligopoly firms often react when other firms in their industry change their prices, it is difficult to know what the oligopolist's demand curve looks like.

Option C

Explanation:

Oligopoly is a business arrangement with a small number of companies, neither of which will restrict others from impacting substantially. The concentration figure tests the biggest firms ' market share. Another corporation is a monopoly, two companies are duopoly and two or more companies are oligopoly companies.

The oligopoly is distinct from monopoly and allocative efficiency since companies consider one another and behavior while choosing cost and quantities.

Due to the often response of Oligopoly firms, if other businesses adjust prices in their market, it is hard to know how the demand curve of Oligopolists appears.