Firms in perfectly competitive markets and firms operating in a market characterized by monopolistic competition have several things in common. Which of the following is least likely one of them? Both: 
 
 
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 A)  | 
operate in markets that have low or no barriers to entry. |    |  
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 B)  | 
face perfectly elastic demand curves. |    |  
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 C)  | 
maximize economic profit. |    |    
 
The only item listed in the question that monopolistic competition and pure competition do not have in common is a perfectly elastic demand curve. Under pure competition, producers face a perfectly elastic demand curve, whereas price searchers face downward sloping demand curves.   |