问题
单项选择题
Which of the following statements regarding marginal costs (MC) and average variable costs (AVC) is most accurate（）
A. MC = AVC when AVC is at its minimum.
B. MC ＜ AVC when AVC is at its minimum.
C. MC = Average total cost when AVC is at its minimum.
答案
参考答案：A
解析：
MC = AVC at minimum average variable cost. MC = ATC at minimum average total cost.
