The use of plants in the cleansing of water includes all of the following except
A) Removing oil from ground water.
B) Using wetlands to cleanse surface water before it moves into ecologically sensitive estuaries and tidal flats.
C) Using plant-laden ponds to treat runoff from roads, parking lots and airport runways.
D) Using gravel-filled basins and wetland plants to treat septic-tank effluent, instead of using a conventional drain field.
Correct Answer:
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