Assume the Tennis Ball Industry, a Perfectly Competitive, Decreasing‐cost Industry

Assume the tennis ball industry, a perfectly competitive, decreasing‐cost industry, is in long-run equilibrium with a market price of $5. If the demand for tennis balls DECREASES, long-run equilibrium will be reestablished at a price

A) greater than $5.
B) less than $5.
C) equal to $5.
D) either greater than or less than $5, depending on the number of firms that enter the industry.