PRICE (per DVD) $21 20 19 18 17 16 15 14 13 12 QUANTITY DEMANDED of DVDs 1 000 000 units 2 000 000 units 3 000 000 units 4 000 000 units 5 000 000 units 6 000 000 units 7 000 000 units 8 000 000 units 9 000 000 units 10 000 000 units QUANTITY SUPPLIED of DVDs 5 500 000 units 5 000 000 units 4 500 000 units 4 000 000 units 3 500 000 units 3 000 000 units 2 500 000 units 2 000 000 units 1 500 000 units 1 000 000 units Refer to Table 4-5. At $13, what is occurring in the market for DVDs? O a. There is a shortage of 7 500 000 DVDs. O b. There is a shortage of 10 500 000 DVDs. O c. There is a surplus of 10 500 000 DVDs * d. There is a surplus of 7 500 000 DVDs