Answer:
.B) shutdown, because it cannot even cover all of its variable costs let alone its fixed costs if it stays in business.
Step-by-step explanation:
In a competitive market, the firm maximize it's profit when the market price of the firm is equal to average variable cost of the firm so that the firm earns normal profits in the long run.
Therefore, if price is less than the average variable cost then the firm should shutdown because it cannot even cover all of its variable costs let alone its fixed costs if it stays in business.