Which of the following statements about the Krebs cycle is correct?

• A. The Krebs cycle does not produce any carbon dioxide.
• B. The Krebs cycle produces NADH and FADH2, which are used in the electron transport chain.
• C. The Krebs cycle occurs in the cytoplasm and produces glucose.
• D. The Krebs cycle directly produces a large amount of ATP.

Answer: (B)