Consider the following structures and identify whether each of the structures A, B, and C is a diastereomer or an enantiomer of D-glucose.

• A. Structure A: enantiomerStructure B: diastereomerStructure C: enantiomer
• B. Structure A: diastereomerStructure B: enantiomerStructure C: enantiomer
• C. Structure A: enantiomerStructure B: enantiomerStructure C: diastereomer
• D. Structure A: enantiomerStructure B: diastereomerStructure C: diastereomer

Answer: (D)