单选题
In a natural monopoly:
A、
one firm controls all natural resources.
B、
the government reserves the industry sector dealing with natural resources for a few firms only.
C、
the average total cost of production continually declines with increased output.
【正确答案】
C
【答案解析】
A monopoly situation in which the average total cost of production continually declines with increased output is called a natural monopoly.
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