Early in the twentieth century, Lake Konfa became very polluted. Recently fish populations have recovered as release of industrial pollutants has declined and the lake' s waters have become cleaner. Fears are now being voiced that the planned construction of an oil pipeline across the lake' s bottom might revive pollution and cause the fish population to decline again. However, a technology for preventing leaks is being installed. Ttherefore, provided this technology is effective, the fears are groundless. Which of the following, if true, most seriously weakens the argument?
A: Changes in land use and drainage patterns around the lake mean that the lake's waters are increasingly likely to be affected by agricultural runoff.
B: The pipeline's construction will disturb sediments at the bottom of the lake, dispersing into the water toxic pollutants that have settled there.
C: A major leak of oil from the pipeline would harm not only the lake's fish but also populations of other aquatic animals and plants.
D: The leak-preventing technology has been in use for several years without any pipeline in which it is installed developing serious leaks.
Choose A, B, C or D as your solution.
B