The Following Figure Shows the Long-Run Average Cost Curve of a Firm

Multiple Choice

The following figure shows the long-run average cost curve of a firm.
Figure 6-1

-Refer to Figure 6-1.The production function of the firm displays increasing returns to scale at all levels of output between _____.

A) 0A to 0E
B) 0C to 0D
C) 0D to 0E
D) 0A to 0B
E) 0B to 0E