C.

While internationally famous among wine aficionados, Barolo is an ultra-premium, low-volume wine that does not rank among the top 3 mass-market Italian sellers. It doesn’t even rank in the top 10. The official top 3 Italian wines sold by volume are Prosecco (13 million gallons sold in 2024), Chianti (4.3 million gallons sold), and Lambrusco (4 million gallons sold). Lambrusco is the leading sparkling red wine in the world, holding an impressive 42.5% revenue share of the global sparkling red market. It is celebrated annually on World Lambrusco Day (June 21st).