What is the most accurate statement about Grand Cru Chablis?

The most accurate statement about Grand Cru Chablis is that the seven vineyards are located in four separate areas of Chablis where the distinct Kimmeridge soil dominates. This is correct because the Grand Cru classification of Chablis includes seven vineyards, each maintaining the unique characteristics imparted by the Kimmeridge soil, which consists of clay and limestone and is pivotal in forming the distinctive flavor profile of the wines. The geographical and geological diversity within these areas contributes significantly to the complexity of the wines produced.

The other statements do not accurately describe Grand Cru Chablis. While Chablis is predominantly known for its white wine production using Chardonnay, the claim of exclusively red production misrepresents the primary output of the region. Additionally, not all Chablis Grand Cru wines are aged in oak barrels; the aging process varies, and some may also be produced without oak influence to emphasize the minerality typical of the region. Lastly, the vineyards are not situated on a single slope; they are distributed across multiple sites, which is integral to expressing the nuances in terroir that affect the wines.