A profit maximizing firm will expand outpu
题型：单项选择题
问题：
A profit maximizing firm will expand output as long as marginal revenue is:（）
A. less than marginal cost.
B. greater than marginal cost.
C. less than average variable cost.
A profit maximizing firm will expand output as long as marginal revenue is:（）
A. less than marginal cost.
B. greater than marginal cost.
C. less than average variable cost.