Answer:
E. below $14.
Explanation:
The decision for a firm is to shut down when price lower than average variable cost.
Since firms maximizes profit when MC is equal to the market price (P), it implies that MC = P.
Since JL Groomers experiences normal cost curves, with the marginal cost (MC) curve crossing average variable cost (AVC) at $14, this implies that MC = P = AVC at this point.
By implication, JL Groomers will always shut down if the market price is below $14.