A 0.1-kg metal bar has a specific heat of 200 J/(kgC). It starts with a temperature of 40C. It is then immersed in a large vat of ice water with ice cubes floating in it. What net heat Q is transferred into the metal bar by the time it achieves the same temperature as the icy reservoir? A) 400 J B)-400 J C) 0 J D)-800 J