What are the main differences between the traditional Champagne method and the Charmat (tank) method for producing sparkling wines?

What are the main differences between the traditional Champagne method and the Charmat (tank) method for producing sparkling wines?

• A. Champagne method uses bottle fermentation with lees aging; Charmat uses tank fermentation for shorter production times and often fruit-forward profiles.
• B. Champagne method uses tank fermentation; Charmat uses bottle fermentation with long lees aging.
• C. Both methods use bottle fermentation and identical aging times.
• D. Charmat method necessarily uses oak barrels; Champagne method uses stainless steel only.

Answer: (A)