Consider the Following Cost Curves for Firm X, a Perfectly

Consider the following cost curves for Firm X, a perfectly competitive firm. FIGURE 9- 3
-Refer to Figure 9- 3. If Firm X is producing output Q1 and the market price is P1,

A) there is no lower- cost scale of plant which could be built by Firm X.
B) new firms have a profit incentive to enter the industry, building larger plants.
C) there are profits to induce increases in output by Firm X, using its existing plant.
D) Firm X is at its long- run profit- maximizing position.
E) Firm X is producing at its minimum efficient scale.