In perfectly competitive markets in the long run, we have the "zero-profit condition". Which of the following best captures the meaning of the zero-profit condition?

Group of answer choices

In the long run, firms have no incentive to exit or enter the industry

In the long run, firms will not be able to cover their fixed costs

In the long run, all firms will earn zero profits, so they cannot pay their employees and will go out of business

In the long run, firms' accounting costs are equal to their revenue

In the long run, all firms earn zero revenue