Which equation in the zinc extraction process shows zinc being formed by reduction?
- A$\text{ZnO} + \text{C} \rightarrow \text{Zn} + \text{CO}$
- B$2\text{ZnS} + 3\text{O}_2 \rightarrow 2\text{ZnO} + 2\text{SO}_2$
- C$\text{Zn(g)} \rightarrow \text{Zn(l)}$
- D$\text{Zn(l)} \rightarrow \text{Zn(s)}$