Scenario: The figure below shows the supply and the demand for a good (left) and the cost curves of an individual firm in this market (right) . Initially, all firms in this market have identical cost curves MC₁ and ATC₁, and the market is in equilibrium at point A. Subsequently, a new production technology has been developed for this product. Some of the existing firms as well as some new firms have adopted the new technology, and their cost curves are MC₂ and ATC₂.

-Refer to the figure above.At A,the market is ________.
A) in the long-run equilibrium, and each firm in the market earns zero economic profit
B) in the long-run equilibrium, and each firm in the market earns positive economic profit
C) in the short-run equilibrium, and each firm in the market earns zero economic profit
D) in the short-run equilibrium, and each firm in the market earns positive economic profit
Correct Answer:
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