NO.PZ2019070101000086
问题如下：
Which of the following properties of coherent risk measures means that aggregating risks does not increase overall risk？
选项：
A.
Monotonicity.
B.
Translation invariance.
C.
Subadditivity.
D.
Positive homogeneity.
解释：
C is correct.
考点：Coherent Risk Measures
解析：
次可加性意味着增加风险资产不会增加总风险。
请问这个题目和四个选项分别怎么理解
