Table 10-3 Quantity Private Value Private Cost External Benefit (Units) (Dollars) (Dollars) (Dollars) 1 22 12 10 20 15 10 18 18 10 In A W N 16 21 10 14 24 10 6 12 27 10 Refer to Table 10-3. The table represents a market in which O a. The answer cannot be determined from inspection of the table. O b. there is a positive externality. O c. there is a negative externality. O d. there is no externality