If a Flood Has a Return Period of Ten Years,it

If a flood has a return period of ten years,it means ______________________.

A) that a similar-sized flood will occur once every ten years
B) that a similar-sized flood has a greater probability of occurring every tenth year than during any one of the intervening years
C) that in any given year a similar flood has a 10% chance of occurring
D) that the flood must be bigger than any other flood during any given 10-year interval