With increase in temperature, the internal energy of a substance

Answer: Option A

$$dU=CvdT-\left[P+T\left(\frac{\left(\frac{\partial V}{\partial T}\right)p}{\left(\frac{\partial V}{\partial P}\right)T}\right)dV\right]$$
SO, we can say on increasing the temperature the internal energy changes increases physically also when we give heat to a system some of the heat is used for raising the thermal energy of the system and doing some work by the system.