Many sustainable cities are building "Sponge Parks"—green spaces designed to soak up heavy rainwater. What specific urban problem does this solve?
(A) It provides free water for the city's fountains.
(B) It prevents "Urban Flooding" by allowing rainwater to seep into the ground instead of overflowing the drains.
(C) It helps in cleaning the windows of nearby buildings.
(D) It prevents the city from getting too dusty during the summer.