Latent heat of fusion is

• A. the amount of heat required to raise the temperature of a substance by 1 K
• B. the amount of heat required to raise the temperature of a 1 kg of a substance by 1 K
• C. the amount of heat required to change the phase of a substance from liquid to gas without any change
• D. the amount of heat required to change the phase of a substance from solid to liquid without any chan