Which sequence correctly outlines the steps of the malate-aspartate shuttle?

• A. Oxaloacetate is converted to aspartate, aspartate enters the matrix, aspartate is oxidized to malate, malate is reduced to oxaloacetate.
• B. Malate is oxidized to oxaloacetate, oxaloacetate enters the matrix, oxaloacetate is reduced to malate, malate is converted to aspartate.
• C. Aspartate is converted to oxaloacetate, oxaloacetate enters the matrix, oxaloacetate is reduced to malate, malate is oxidized to aspartate.
• D. Oxaloacetate is reduced to malate, malate enters the matrix, malate is oxidized to oxaloacetate, oxaloacetate is converted to aspartate.

Answer: (D)