The figure given below shows the market for MP3 p layers in a small country . D d and S d are the domestic demand and domestic supply curves of the MP3 players before the imposition of the quota. ( S d + Q Q ) is the total available domestic supply curve after the quota has been imposed. According to the figure , how much revenue can the government expect to receive if the import licenses are auctioned ? Price $80 $90 0 D d S d World price Domestic price with quota Quantity (Millions of MP3 players per year) 10 17 12 22 S d + Q Q Quota Q Q a. $20 million b. $50 million c. $120 million d. $170 million