题目内容：
The expected value of a risk event is calculated by multiplying the ． （ ）A．Likelihood of the event by the consequence of its occurrence
B．Likelihood of the event by the number of risk events
C．The number of risk events by the consequences of their occurrence
D．The likelihood of the greatest risk event by the consequence of the smallest risk event A．事件发生的可能性乘以事件发生的结果
B．事件发生的可能性乘以风险事件发生次数
C．风险事件发生次数乘以事件发生的结果
D．最大风险的事件发生可能性乘以最小风险的事件的发生的结果
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