Which equation shows a reaction that occurs in a fuel cell?
- A$\text{C} + \text{O}_2 \rightarrow \text{CO}_2$
- B$2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$
- C$\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$
- D$\text{C}_3\text{H}_8 + 5\text{O}_2 \rightarrow 3\text{CO}_2 + 4\text{H}_2\text{O}$