Consider a perfectly competitive firm.Which of the following equalities could hold true in a short-run equilibrium but not in a long-run equilibrium?

Question

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In the short-run, a perfectly competitive firm could operate at a price level that is equal to its average variable cost (P = AVC), as long as it is able to cover its variable costs and some portion of its fixed costs. However, in the long-run, all firms will have to cover their total costs (TC = TFC + TVC) in order to remain in the industry, and the price level will adjust accordingly. The other options (A, B, C, and E) hold true in both short-run and long-run equilibria for perfectly competitive firms.

Consider a Perfectly Competitive Firm