How does leghemoglobin protect the nitrogenase enzyme during nitrogen fixation, and why is this protection crucial?

• A. Leghemoglobin binds oxygen, preventing nitrogenase inactivation
• B. Leghemoglobin enhances nitrogenase activity by increasing oxygen concentration
• C. Leghemoglobin breaks down nitrogenase, facilitating its absorption by plants
• D. Leghemoglobin transports nitrogenase to root nodules

Answer: (A)