The label on a washing machine indicates that the washer will use $85 worth of hot water if the water is heated by a 90 percent efficient electric heater at an electricity rate of $0.125/kWh. If the water is heated from 18 to 45°C, the amount of hot water an average family uses per year is

(a) 19.5 tons

(b) 21.7 tons

(c) 24.1 tons

(d) 27.2 tons

(e) 30.4 tons