The Effects of Flooding Are More Destructive Today Than in the Past

The effects of flooding are more destructive today than in the past because:

A) the use of levees has been determined to be an unsound engineering practice.
B) retaining walls are too expensive to build in all of the appropriate locations.
C) buildings are constructed on flood plains.
D) soil with plant cover is ineffective in absorbing excess water.
E) roads and buildings effectively absorb and slow water flow.