The correct option is C Specific heat
Extensive property vary with the amount of substance.
Intensive property does not vary with the amount of substance.
Heat capacity is defined as the amount of heat energy required to raise the temperature of a given quantity of matter by one degree Celsius. Hence, it does not vary with amount of substance. Thus, it is a intensive property.
Extensive property : Enthalpy, entropy, volume.
Hence, option (c) is correct answer.