The marginal costs $($MC$),$ average variable costs $($AVC$),$ and average total costs $($ATC$)$ for a firm are shown in the figure below.

Suppose the market is initially in a long$-$run equilibrium. Then, consumers find out that the product is harmful to one's health. This will cause the

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to

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and will cause the market price to

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$.$ Profit for this firm will

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$.$ As a result, firms will

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the market, which will cause the

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to

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and will cause the market price to

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until the profit for the marginal firm entering or exiting the market is

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$.$