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【单选题】
Mr. Cog has 18 hours per day to divide between labor and leisure. His utility function is U(C,R) = CR; where C is dollars per year spent on consumption and R is hours of leisure. If he has 19 dollars of nonlabor income per day and gets a wage rate of 15 dollars per hour when he works, his budget equation, expressing combinations of consumption and leisure that he can afford to have, can be written as:A.
15R+ C = 19.
B.
15R + C = 289.
C.
R + C/15 = 379.
D.
C = 289 + 15R.
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A.
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B.
结果是一样的！
C.
第二段代码正确。
D.
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