Why are such phenomena as hurricane katrina and rare earthquakes in regions where oil shale is fracked called "hundred-year" events?

c. They are statistical outliers that typically do not occur within a normal human lifespan.

Explanation:

A hundred-year event are those that are used to attempted to simplify the definition of events such as the floods that have one percent chance of occurring in a year

Answer the above statement is correct (true);

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