NO.PZ2016121201000001
问题如下：
Which of the following statemtents about unit elastic on demand curve is most likely correct ?
选项：
A.Total revenue achieve its minimum value.
B.Total revenue is between it minimum value and maximal value.
C.Total revenue achieve its maximal value.
解释：
C is correct.
When own-price elasticity is equal to -1, total revenue achieve its maximal value.
如题，单位弹性的话如何判断选项呢？
