Which of the Following Is True of Stormflow and Hydrographs

Which of the following is true of stormflow and hydrographs for urban areas?

A) the time lag between maximum precipitation and maximum discharge is more for urban areas than for rural areas.
B) the time required for discharge to drop after a flood is shorter for urban areas than for rural areas.
C) the amount of surface runoff is less in urban areas.
D) urbanization decreases the possibility of a flood downstream from a major city.
E) urbanization has a minimal effect on flooding and the storm hydrograph.