It can be inferred from the graph above that the decreasing water levels in Walker Lake are caused by the creation of reservoirs. Which of the following is evidence from the graph that shows the effect decreased water levels have had on the lake?
A:The dissolved solid concentration is increasing.
B:The graph does not show evidence of any effect decreased water levels are having on the lake.
C:The water temperature is rising.
D:The fish population is decreasing.
