Which of the following is true about fermentation involving gas production?

• A. The disadvantage of gas is that energy wise it is less efficient as they‚Äö√Ñ√∂‚àö√ë‚àö¬•ve no preserving power in concentrations found in comparison with lactic acid
• B. Sugar molecules are altered to form acids, alcohols and carbon dioxide
• C. Sodium chloride is added as a substrate as a controlling influence
• D. All of the mentioned