Final answer:
The grape variety used to make AC Côte Rôtie is Syrah.
Step-by-step explanation:
The grape variety used to make AC Côte Rôtie is Syrah. AC Côte Rôtie is a prestigious wine appellation in the northern Rhône region of France, known for producing elegant and complex red wines. Syrah is the primary grape variety used in the production of AC Côte Rôtie wines, although a small percentage of Viognier, a white grape variety, is also allowed to be blended with Syrah.
The grape variety used to make AC Côte Rôtie is primarily Syrah. This prestigious appellation of the Rhône Valley in France allows winemakers to blend a small proportion of Viognier, up to 20% is permitted, but the wine is dominantly Syrah. The combination of these two grapes creates wines that are highly prized for their aromatic complexity and aging potential. AC Côte Rôtie wines are known for their stark contrast to wines made from other grape varieties such as Sémillon or Riesling, which are used in other types of wine productions, like sweet wines from Bordeaux for Sémillon and aromatic white wines for Riesling.