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【单选题】
The price of shrimp is $10.00 per pound and the price of lobster is $15.00 per pound. The marginal utility to Mike of pound of shrimp consumed is 60 utils. If Mike maximizes his satisfaction by consuming both shrimp and lobster, we would expect the marginal utility of the last pound of lobster consumed to equal:A.
40 utils
B.
60 utils
C.
90 utils
D.
150 utils
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A.
scanf('%d',&(*p).age);
B.
scanf('%st',&std.name);
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D.
scanf('%c',&(p-＞sex));
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