Which of the following is a key wine from the Nantais region?

The Nantais region, located in the Loire Valley of France, is renowned for its white wines, particularly those made from the Melon de Bourgogne grape. Muscadet Sèvre et Maine sur Lie is a key wine produced in this region, often considered a benchmark for the style. The "sur lie" designation indicates that the wine has been aged on its lees (the dead yeast cells that settle after fermentation), which enhances the complexity and texture of the wine.

This aging process not only imparts a rich, creamy mouthfeel but also contributes to the wine's characteristic minerality and vibrant acidity, making Muscadet Sèvre et Maine sur Lie an excellent pairing for seafood, particularly shellfish—an important aspect of the local culinary tradition.

In contrast, the other choices—Sancerre, Coteaux du Layon, and Vouvray—are associated with different regions within the Loire Valley. Sancerre is primarily known for Sauvignon Blanc, Coteaux du Layon is recognized for its sweet Chenin Blanc wines, and Vouvray is celebrated for its various styles of Chenin Blanc. Thus, Muscadet Sèvre et Maine sur Lie stands out as the quintessential key wine from the Nantais region.