The river overflowed and Wilma's basement has four feet of water in it. Unfortunately, her flood insurer isn't paying her claim for damage because it says the occurrence doesn't meet the definition of 'flood' in her policy. Which of the following occurrences DOES meet the definition of 'flood'?
A. Water sweeps Wilma's house off its foundation
B. Water fills the first floor of Wilma's house
C. Water inundates one acre of Wilma's land
D. Water inundates all of Wilma's land and all of her next-door neighbor's land