In an electric toaster, electricity passes through thin metal wires (called filaments) inside the toaster, causing the wires to glow and heat up. The heat given off by the filaments then toasts the bread. If 500 kilojoules of electricity are supplied to a toaster, which choice below could represent the total amount of heat energy given off by the filaments of the toaster? A. 505 kilojoules B. 630 kilojoules C. 520 kilojoules D. 480 kilojoules