How is an event magnitude calculated?
A . As the sum of the three properties Severity, Credibility and Relevance of the Event
B . As the sum of the three properties Severity, Credibility and Importance of the Event
C . As a weighted mean of the three properties Severity, Credibility and Relevance of the Event
D . As a weighted mean of the three properties Severity, Credibility and Importance of the Event
Answer: C