What are the 3 main red grape varieties in Côtes-du-Rhône?

The three main red grape varieties in Côtes-du-Rhône are Grenache, Syrah, and Mourvèdre. This combination is often referred to as the GSM blend, and these grapes play a significant role in the region's wine production.

Grenache is the most widely planted variety in Côtes-du-Rhône, known for its fruity flavors and high alcohol content. Syrah adds structure and darker fruit flavors, while Mourvèdre provides depth, tannin, and is important for balancing the wine’s overall profile. Together, these varieties are well-suited to the climate and soil of the region, allowing them to thrive and produce wines that are characterized by rich flavors, complexity, and aging potential.

The other options listed do not pertain to the primary red grape varieties of Côtes-du-Rhône. The varieties in those choices belong to different wine-producing regions or are less commonly associated with this specific area. This makes them incorrect in the context of identifying the main red grapes of Côtes-du-Rhône.