C. total heat energy of the substance has increased
Explanation:
This is because when there is a change in temperature, the heat energy of a substance either increases or decreases. If the temperature increases, its heat energy increases and if its temperature decreases, its heat enery decreases.
We can use voltage divider to solve this problem that is defined as the passive linear circuit producing an output voltage that is a fraction of its input voltage . So we can use the formula: