Which one of the following does not occur when firms in a perfectly competitive market make an economic profit?

Question

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In a perfectly competitive market, when firms make an economic profit, it attracts new firms into the market, increasing the overall market supply (B) and causing the market price to fall (E), which in turn decreases the economic profit of each firm (D). However, it does not necessarily mean that each existing firm increases production (C); their decision to increase production depends on their individual cost structures and the new market equilibrium price.

Which One of the Following Does Not Occur When Firms