The water level in Catherine's hot tub was below the recommended water level when she turned the hose on. She forgot to turn the hose off and filled the hot tub above the recommended water level. The number line below shows the number of gallons below the recommended water level the hot tub was when she turned the hose on and the number of gallons above the recommended water level the hot tub was when she turned it off. According to the number line, how many gallons of water did Catherine put in the hot tub? A. B. C. D.