Sites with Natural Hazards Need to Be Studied and Their

Sites with natural hazards need to be studied and their risk evaluated to prevent a natural disaster.The frequency of an event is __________.

A) the number of occurrences of an event within in a given time period
B) the average number of years between events
C) commonly used to forecast exactly when a natural event will occur
D) the cyclic occurrence of events within a given space
E) the range over which the upper and lower magnitudes for a given event are predicted