Which of the following grapes is commonly found in a Bordeaux blend?

Cabernet Sauvignon is a key grape variety in Bordeaux blends, which typically consist of a combination of several grape types to achieve a balanced flavor profile. In Bordeaux, the most common blending grapes include Cabernet Sauvignon, Merlot, and Cabernet Franc, with Cabernet Sauvignon being favored for its structure, tannins, and ability to age well.

The significance of Cabernet Sauvignon in Bordeaux wines lies in its capacity to contribute rich fruit flavors, such as blackcurrant and plum, as well as herbaceous notes and a good acidity. This grape's robust characteristics enable it to withstand blending with other varieties, enhancing the complexity and depth of the final wine.

In contrast, while Chardonnay, Syrah, and Pinot Noir are important varietals in their respective regions and contexts, they do not typically play a significant role in Bordeaux blends. Chardonnay is primarily associated with white wine production, Syrah is mostly linked to the Rhône Valley, and Pinot Noir is renowned for its use in Burgundy and in sparkling wines. Thus, Cabernet Sauvignon stands out as the cornerstone of a traditional Bordeaux blend.