The Following Figure Shows Equilibrium at the Industry and Firm

The following figure shows equilibrium at the industry and firm level. Figure 9.6
In the figure,
S₁,S₂,S₃ are the market supply curves.
D₁ and D₂ are the market demand curves.
MC is the marginal cost curve of the firm.
MR₁ and MR₂ are the marginal revenue curves of the firm.
ATC is the average-total-cost curve of the firm.
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According to Figure 9.6,in the long run,the firm:

A) will produce at quantity 9 and price $1.50.
B) will produce at quantity 9 and price $1.
C) will produce at quantity 10 and price $1.50.
D) will produce at quantity 19 and price $1.25.
E) will shut down.