What percentage of wine in Chile must come from the stated grape to be included on that label?

In Chile, for a wine label to state a specific grape variety, at least 75% of the wine must be made from that grape. This regulation is in place to ensure that consumers can trust the label's claims and understand what they are purchasing. The requirement helps maintain a level of quality and authenticity in Chilean wines, as it guarantees that the grape variety prominently featured on the label is significantly present in the bottle. Therefore, the correct answer highlights this key regulation in the Chilean wine industry regarding varietal labeling.