This reaction describes the use of sulfate as an electron acceptor by anaerobic bacteria (bacterial sulfate reduction) that degrade organics. Balance the reaction.
a) CH₃CH₂OH + SO4²⁻ → CO₂ + H₂S + H₂O
b) C₆H₁₂O₆ + SO4²⁻ → 6CO₂ + 6H₂S
c) C₂H₅OH + SO4²⁻ → CO₂ + H₂S + H₂O
d) CH₄ + SO₄²⁻ → CO₂ + 2H₂S