Urgent.

which of the following is a possible benefit of flood mitigation efforts?

a): they can prevent hurricanes and other damaging storms.
b): they can open a floodplain area for public use.
c): they have no maintenance costs.
d): they result in lower taxes.

Forms of Flood Mitigation

They include floodwalls/seawalls, floodgates, levees, and evacuation routes. Nonstructural measures reduce damage by removing people and property out of risk areas. They include elevated structures, property buyouts, permanent relocation, zoning, subdivision, and building codes.

Explanation:

when it is at an intermediate population density