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【单选题】
Izaak likes to eat pizza and to fish. The more fishing he does the happier he is, up to 8 hours a day. If he fishes longer than 8 hours he gets a sore back and is less happy than if he hadn'tfished at all. For y less than or equal to 8, his utility function is U (x,y) = x + 4y where x is money spent on pizza and y is hours per day spent fishing. His income is $45 a day and he has no expenses other than pizza. The Bureau of Fisheries has just decided to allow people without fshing licenses to fish only 3 hours a day. But if you buy a fishing license, you can fish as many hours as you wish. How much is Izaak willing pay for a license?A.
20
B.
32
C.
23
D.
18
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