Which statement is true?a.In the short run, marginal cost intersects average variable cost from below at the maximum of average variable cost. b. In the short run, marginal cost intersects average total cost from below at the minimum of margin

Which statement is true?
a.In the short run, marginal cost intersects average variable cost from below at the maximum of average variable cost.
b. In the short run, marginal cost intersects average total cost from below at the minimum of marginal cost.
c. In the short run, marginal cost intersects average fixed cost at the minimum of average fixed cost.
d. In the short run, marginal cost intersects average total cost at the minimum of average total cost.
e. Both c and d are true.

短期里面...边际成本线与平均成本曲线交于平均成本线的最低点...答案是D...
建议：书上找个图看一下,在成本论那一块.