GKFix MCQ Question

In the reaction CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l), what is the role of O₂?

• A. O₂ is oxidized.
• B. O₂ remains unchanged.
• C. O₂ acts as a catalyst.
• D. O₂ is reduced.