Which statement is true about the particles of a solid, when a solid changes into a liquid

Which statement is true about the particles of a solid when the solid changes into a liquid? (5 points)

a. They stop vibrating.

Selected: b. Their kinetic energy increases. This answer is correct.

c. They move closer to each other.

d. The attractive force between them increases.

Explanation: when a solid turns to a liquid it means it was melted and it needs to be heated to melt meaning the kinetic energy increases because the solid was heated up. Also this was on my test and i got it right so yeah.

law of conservation of matter