Aluminium is obtained from bauxite using electrolysis. Which row gives the material used for the anode and the reaction at the anode?
- Acarbon; $\text{Al}^{3+} + 3e^- \rightarrow \text{Al}$
- Bcarbon; $2\text{O}^{2-} \rightarrow \text{O}_2 + 4e^-$
- Csteel; $\text{Al}^{3+} + 3e^- \rightarrow \text{Al}$
- Dsteel; $2\text{O}^{2-} \rightarrow \text{O}_2 + 4e^-$