Over an extended period, which of the following statements is true?

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Every company is guaranteed to earn economic profits.No production factors remain fixed.A business can adjust all inputs but cannot alter their proportions.A company may temporarily cease operations but cannot leave the market.

Explanation

In the long run, all inputs are variable, meaning no factors of production are fixed. This allows firms to adjust all resources to optimize production. Therefore, option B is correct. The other options are incorrect because firms do not necessarily earn economic profits (A), they can change the input mix (C), and they can fully exit the industry, not just shut down temporarily (D).