单选题
For a closed two-good economy, the output of the two goods should be at the point where: （ ）
A、
The highest indifference curve touches the production possibility curve.
B、
The lowest indifference curve touches the production possibility curve.
C、
The indifference curve crosses the production possibility curve.
D、
The marginal cost curve touches the production possibility curve.
【正确答案】
A
【答案解析】
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