Cynthia sees that most of the ice in her iced tea has melted. Assuming the water and the ice are at the same temperature, what happened to the particles in her ice?

The particles have a higher temperature than before and are moving more freely.
The particles have a higher temperature than before and are moving more freely.

The particles have the same amount of kinetic energy but no longer vibrate in place.
The particles have the same amount of kinetic energy but no longer vibrate in place.

The particles have a much greater amount of kinetic energy than before.
The particles have a much greater amount of kinetic energy than before.

The particles have had their kinetic energy converted into thermal energy.