In the context of the long-run equilibrium in a competitive industry, what does it mean when the demand curve (AR) is tangential to the firm's long-run average cost curve? （ ）
A、The firm is experiencing supernormal profits.
B、The firm is operating at a loss.
C、The firm is earning normal profits.
D、The firm is maximizing its production output.
发布时间：2025-07-20 11:49:23
