What is a key method to prevent oxidation during production and storage?

• A. Increasing oxygen exposure
• B. Using red wine as a practice
• C. Avoiding cold stabilization
• D. Proper SO2 management

Answer: (D)

The idea being tested is how protective agents in wine prevent oxidation during production and storage, with sulfur dioxide as the main safeguard. Proper SO2 management is the best choice because sulfur dioxide acts as a chemical antioxidant, scavenging oxygen-derived reactive species and forming stable sulfonated compounds with oxidation products like aldehydes and quinones. This helps preserve color, aroma, and freshness as the wine ages. Its effectiveness depends on pH—more active molecular SO2 is available at lower pH—so winemakers tailor SO2 levels at key stages from crushing through bottling to maintain protection. Increasing oxygen exposure would accelerate oxidation, cold stabilization is about tartrate removal rather than oxidation control, and using red wine as a practice has no relevance to preventing oxidation.