Letter to the editor: If the water level in the Searle River Delta continues to drop, the rising sea level will make the water saltier and less suitable for drinking. Currently, 40 percent of the water from upstream tributaries is diverted to neighboring areas. To keep the delta's water level from dropping any further, we should end all current diversions from the upstream tributaries. Neighboring water utilities are likely to see higher costs and diminished water supplies, but these costs are necessary to preserve the delta.

Core-To keep the delta's water level from dropping any further, we should end all current diversions from the upstream tributaries.
Which of the following would, if true, indicate a serious potential weakness of the suggested plan of action?

A. Desalination equipment would allow water from the delta to be used for drinking even it if became saltier.- incorrect, but what about the general health of the delta, high saline levels are likely to negative impact on it. Also, we do not ONLY talk about drinking water but also about preserving the delta.
B. Water level is only one factor that affects salinity in the delta.- incorrect, water level NEED NOT be the ONLY factor that affects salinity in the delta, but ending current diversion still might have a significant impact
C. The upstream tributaries' water levels are controlled by systems of dams and reservoirs.- incorrect, how the water levels are controlled is not relevant. If it at all, it seems that it would be feasible to implement our plan
D. Neighboring areas have grown in population since the water was first diverted from upstream tributaries.- irrelevant, this might mean that more people have inconvenience because of diminished water supplies
E. Much of the recent drop in the delta's water level can be attributed to a prolonged drought that has recently ended. - Correct, the primary cause of recent drop in water level is a prolonged drought(Cause). Since the drought has ended, we can expect the water level in delta to rise


Answer E