Fiona is serving iced tea and lemonade at a picnic. She has only 44 cups in which to serve the drinks. If x represents the number of glasses of iced tea and y represents the number of glasses of lemonade, which equation represents the number of drinks she can serve? A. x – y = 44 B. 44 + y = x C. y – x = 44 D. x = 44 – y