Which one of the following would raise the temperature of 20 g of water at 30°C most, when added to water? (Specific heat of copper = 0.1 cal/g C⁰)

• A

  20 g of water at 40°C

• B

  80 g of water at 27°C

• C

  1000 g of copper at 25°C

• D

  4 g of water at 80°C