How does the orientation of the alcohol group's attack on the carbonyl group affect the formation of alpha and beta anomers?

• A. The attack from either side forms only the alpha anomer.
• B. The attack from the bottom side forms the alpha anomer, while the attack from the top side forms the beta anomer.
• C. The attack from either side forms only the beta anomer.
• D. The attack from the top side forms the alpha anomer, while the attack from the bottom side forms the beta anomer.

Answer: (D)