Why does the reversal of pyruvate kinase's action in glycolysis require two steps in gluconeogenesis?

• A. Pyruvate kinase's action is highly favorable and cannot be reversed in a single step.
• B. Pyruvate kinase is inhibited by ATP.
• C. Pyruvate kinase requires two different enzymes to function.
• D. The reaction is too slow to be completed in one step.

Answer: (A)