Exhibit 1A-10 Multi-curve graph 30 Price 25 per ANNUAL INCOME = compact 20 $40,000 disc 15 (dollars) 10 5 -ANNUAL INCOME = $20,000 0 20 40 60 80 100 120 Quantity of compact discs (millions per year) Exhibit 1A-10 represents a three-variable relationship. As the annual income of consumers rises from $20,000 (line A) to $40,000 (line B), the result is a: O a. rightward shift from curve A to curve B. O b. rightward movement along each curve. O c. leftward movement along each curve. O d. leftward shift from curve B to curve A