Heat was supplied to a block of ice at 0^oC until half of it melted. Which of the following statements is true?

• A.the temperature rises and the ice expand
• B.the temperature remains constant and the volume of the ice decreases
• C.the ice gives out heat as it melts and the temperature decreases
• D.the mass remains constant and the temperature increases
• E.the temperature decreases because some heat is lost