Assess the impact of byproducts like ethanol and lactic acid on the efficiency of anaerobic respiration.

• A. Byproducts like ethanol and lactic acid enhance anaerobic respiration efficiency as they contribute to ATP production.
• B. Byproducts like ethanol and lactic acid have no impact on anaerobic respiration efficiency.
• C. Byproducts like ethanol and lactic acid are essential for aerobic respiration efficiency.
• D. Byproducts like ethanol and lactic acid limit anaerobic respiration efficiency as they do not contribute to ATP production.

Answer: (D)