The graph shown below represents the rate at which water drains from a tank once the drain is opened which statement correctly describes the graph A. The water is draining at constant rate of 1/2 gallon per minute, and the tank contained exactly 14 gallons when the drain opened

B. The water is draining at a constant rate of 2 gallons per minute, and the tank contained exactly 14 gallons when the drain was opened

C. The water is draining at a constant rate of 5 gallons per minute, and the tank contained exactly 14 gallons when the drain was opened

D. the water is draining at a constant rate of 14 gallons per minute, and the tank contained exactly 1/2 gallon when the drain was opened