What is the primary role of the cork in a Champagne bottle?

• A. Seals under high pressure
• B. Lets gas escape quickly
• C. Maintains color
• D. Affects flavor

Answer: (A)

The key idea is that the cork acts as a high-pressure seal. Champagne bottles are filled with wine that has dissolved carbon dioxide, so the bottle sits under substantial internal pressure. The cork, being elastic and compressible, expands to fill the neck and creates a tight seal that keeps the CO2 trapped inside, preserving the sparkle. The wire cage helps keep the cork in place, but the cork itself is what stops gas from escaping and maintains the pressure.

The other possibilities aren’t the primary function: the cork isn’t meant to let gas escape quickly, or to directly maintain bottle color. Flavor can be influenced by the cork in some cases, but that’s not its primary role—the main job is to seal under high pressure.