Which reaction occurs at the cathode in the electrolysis of molten nickel(II) chloride?
- A$\text{Cl}_2 + 2\text{e}^- \rightarrow 2\text{Cl}^-$
- B$2\text{Cl}^- \rightarrow \text{Cl}_2 + 2\text{e}^-$
- C$\text{Ni} \rightarrow \text{Ni}^{2+} + 2\text{e}^-$
- D$\text{Ni}^{2+} + 2\text{e}^- \rightarrow \text{Ni}$