What do scientists mean when they say that a flood is a 100-year flood?

A)A flood of that magnitude will occur once every 100 years.
B)Every year there is a 1% chance of a flood of a certain magnitude occurring.
C)There isn't enough information to determine how frequently flooding occurs.
D)Every year, there is a 10% chance of a flood of a certain magnitude occurring.
E)The last time a flood of that size occurred was 100 years ago.


B

Environmental & Atmospheric Sciences

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