A beaker holds some cold water. A purple crystal is placed at the bottom of the beaker. The beaker is then gently heated underneath the crystal. The crystal dissolves in the water. As shown in the diagram, the colour spreads. Three students each make a statement about the experiment. Which students are correct?
- A1 and 2 only
- B1 and 3 only
- C2 and 3 only
- D1, 2 and 3