For an object of mass $2.0\,\text{kg}$, its heat capacity is $C$. The energy required to
- Aincrease the temperature of the whole object by $\Delta t$ is $C\Delta t$.
- Bincrease the temperature of unit mass of the object by $\Delta t$ is $C\Delta t$.
- Cmelt the whole object is $C$.
- Dmelt unit mass of the object is $C$.