NO.PZ2021030502000003
问题如下：
Which of the following statements about policy responses to a cyber event is incorrect?
选项：
A.Ex ante capital requirements or ex post liquidity provision are effective.
B.It is necessary to strengthen ex ante regulation and supervision to deal with cyber events.
C.A cyber event may require ex post liquidity injections.
D.The provision of dedicated back-up facilities in core markets in order to reduce the impact of availability and integrity events.
解释：
A is correct
Due to the unique properties of cyber events, traditional policy tools such as ex ante capital requirements or ex post liquidity provision may not be as effective.（由于网络事件的独特性，很多措施并没有想象中有效果）。所以A选项的描述是错误的。
老师，ex post liquidity provision 是什么意思呢？
