问题
单项选择题
Which of the following most accurately describes the shape of the average fixed cost (AFC) curve The AFC curve:（）
A. is always below the average variable cost curve.
B. has the same shape as the average total cost curve.
C. becomes flatter as output increases.
答案
参考答案：C
解析：
The AFC curve declines initially, but as output increases it flattens because a fixed cost is being averaged over more and more units of output.