Answer:
C. lose money equal to its total fixed costs.
Explanation:
The revenue of a firm in a perfectly competitive market depends on the forces of demand and supply. If such a firm consistently operates at a loss in the short run, it means that its price is lower than its average variable costs or revenues are lower than its total costs. If it shuts down, it won't be incurring variable costs but only lose money equal to fixed costs making choice C correct.