How does oxaloacetate function in both gluconeogenesis and the citric acid cycle?

• A. Oxaloacetate is a key intermediate in both pathways, linking gluconeogenesis to the citric acid cycle.
• B. Oxaloacetate is only involved in gluconeogenesis and not in the citric acid cycle.
• C. Oxaloacetate is converted directly to glucose in the citric acid cycle.
• D. Oxaloacetate is a waste product in both pathways.

Answer: (A)