申論題

2. Suppose the demand curve of a specifc kind of fower for Country A is Q^D = 200 - P, where Q^D is the quantity demanded and P is the price. The supply curve in the same market is Q^s = 3P, where Q^s is the quantity supplied.

(B) (5 points) How can the government deal with the issue of the external benefit that is described above? Please clearly explain your answer.