Which scenario could be represented by this graph? A. For some time, the water level of the Humphrey Dam doesn't change. During a long drought, the water level falls, decreasing at a constant rate. The x-axis represents time; the y-axis represents the height of the water behind the dam. B. For some time, heavy rain causes the water level to rise behind the Humphrey Dam. When the rain subsides, the height of the water remains high. The x-axis represents time; the y-axis represents the height of the water behind the dam. C. For some time, the water level of the Humphrey Dam doesn't change. During a long rain spell, the water level rises, increasing at a constant rate. After the rain subsides, it levels off again. The x- axis represents time; the yaxis represents the height of the water behind the dam. D. At first, there is no water behind the Humphrey Dam. As the river is redirected toward the dam, the water level rises steadily. The x- axis represents time; the yaxis represents the height of the water behind the dam.