How does pyruvate's role as an electron acceptor in fermentation affect other metabolic pathways?

• A. Pyruvate donates electrons to NADH, regenerating NAD+ and enhancing the use of other metabolic pathways.
• B. Pyruvate accepts electrons from NAD+, regenerating NADH and limiting the use of other metabolic pathways.
• C. Pyruvate donates electrons to NAD+, regenerating NADH and enhancing the use of other metabolic pathways.
• D. Pyruvate accepts electrons from NADH, regenerating NAD+ and limiting the use of other metabolic pathways.