The Figure Given Below Shows Three Short Run Average Total

The figure given below shows three Short Run Average Total Cost (SRATC) curves and the Long Run Average Total Cost (LRATC) curve of a firm. Figure 21.3 Refer to the Figure 21.3.In the long run, an increase in production from Q₁ to Q₃ would:

A) increase average cost by C₄ - C₁.
B) increase average cost by C₃ - C₁.
C) increase average cost by C₃ - C₂.
D) decrease average cost by C₃ - C₁.
E) decrease average cost by C₃ - C₂.