D项

问题如下：

Which of the following statements about cyber risk is incorrect?

选项：

A.

“Cyber risk” is an umbrella term encompassing a wide range of risks resulting from the failure or breach of IT systems.

B.

A “cyber incident” is any unobservable occurrence in an information system

C.

"Cyber incident" may be jeopardizes the cyber security of an information system or the information the system processes, stores or transmits.

D.

machine learning can be applied to three classes of statistical problems: regression, classification, and prediction.

解释：

Correct answer: B

B选项的描述错误，“网络事件”是信息系统中任何”可观察”到的事件,无法观察的风险不属于cyber incident。