Which of the Following Reactions Describes How Some Species of Archaea

Which of the following reactions describes how some species of archaea produce carbon dioxide under anaerobic conditions?

A) 3 CH₃OH $\rightarrow$ CO₂ + 6 H₂O + 3 CH₄
B) 4 CH₃OH $\rightarrow$ CO₂ + 2 H₂O + 3 CH₄
C) CO₂ + H₂O + 3 CH₄ $\rightarrow$ 2 CH₃OH
D) 3 CH₃OH + O₂ $\rightarrow$ CO₂ + H₂O₂ + 2 CH₄