Hurricane katrina was a catastrophe,contributing to the problem was subsiding of the region from 3 to 12 feet per 100 years.Which one of the following is not a cause of this subsidence?
A)
Extraction of ground water
B)
Extraction of oil and gas
C)
Loss of fresh waterwetlands
D)
Lack of tall tress such as cyprus
E)
Building on hilly areas