Answer: Option C
Step-by-step explanation:
The molecules has kinetic energy and potential energy both. When the water molecules were heated on a Bunsen Burner then there can be a slight increase in the volume of the water.
This is because upon heating the kinetic energy of the molecules increases and it starts moving fastly.
Due to the movement of the particles, they become far from each other and there is a slight increase in the volume of the water.