able below shows the production cost for two utilities at different levels of sulfur dioxide emissions. Assume that the government issued 8 marketable pollution permits to each firm. If Firm B would like to purchase one permit to be able to discharge nine tons of sulfur dioxide, what is Firm B's willingness to pay?

Select one:

a. $2,000

b. $5,000

c. $6,000

d. $9,000

Sulfur Dioxide Discharged (Tons)	Firm A	Firm B
10	$8,000	$9,000
9	10,000	12,000
8	15,000	18,000
7	20,000	27,000
6	28,000	37,000