The diagram depicts a cell used for the production of aluminium. Which statement is not correct?
- AAluminium ions are oxidised in this process.
- BAluminium is liberated at the cathode by the reaction $\text{Al}^{3+} + 3e^{-} \rightarrow \text{Al}$.
- CThe cryolite acts as a solvent.
- DThe graphite anode burns away.