10 g of ice at -20°C is dropped into a calorimeter containing 10 g of water at l 0°C; the specific heat _of water is twice that  of ice . When equilibrium is reached,· the calorimeter will contain:

• A

  20 g of water

• B

  20 g of ice

• C

  10 g ice and 10 g water

• D

  5 g ice and 15 g water