问题如下：
If total variable cost of a firm is higher than its total revenue, then the firm should:
选项：
A.operate in the short term.
B.shut down in the short term.
C.shut down in the short term but operate in the long term.
解释：
B is correct.
When TR 考点：Shutdown and Breakeven Point 解析：当厂商的总收入小于其总可变成本的时候，在短期厂家应该停止生产，长期退出该行业，因此只有B选项的说法正确。
老师，请问，个人认为还是要继续生产，覆盖固定成本，长期应该是退出
