问题
单项选择题
In the long run, if price is below average total cost (ATC), the firm will:（）
A. shut down.
B. keep running.
C. produce more.
答案
参考答案：A
解析：
If the price is below ATC then the firm is losing money. If the firm believes the price will never exceed ATC the only way to eliminate fixed costs is to go out of business.