The Figure Below Depicts the Short-Run Market Equilibrium in a Perfectly

Multiple Choice

The figure below depicts the short-run market equilibrium in a perfectly competitive market and the cost curves for a representative firm in that market. Assume that all firms in this market have identical cost curves. The long-run market equilibrium quantity in this industry is:

A) 300.
B) 500.
C) 700.
D) more than 700.