According to the drawing, the material went from a solid state to a gaseous state, as shown in option C.
What are the states of matter?
Solid.
Liquid.
Gaseous.
It is possible to identify the physical state of matter according to the organization of the particles. This is because, in the solid state, the particles are very close to each other, leaving no space between them for movement. In the liquid state, the space between the particles is slightly larger, and in the gaseous state, the space is huge, allowing the particles to move randomly.
As we can see in the drawing, the particles were very close together, indicating the solid state, but a large space appears between them indicating the change to the gaseous state.