What Is the Importance of the Idea That "Hazards Are

What is the importance of the idea that "hazards are repetitive"?

A) We need to look to past events to understand what is probable for the future.
B) If something has already happened, like a volcanic eruption, then we won't need to worry about it.
C) New events will probably happen exactly like old ones, so we need to be prepared.
D) Hazards keep happening constantly in an area, so people already know how to react to them.
E) All of the above statements support the idea that "hazards are repetitive."