What is the common base spirit used across all variations of Absolut vodka?

The correct answer is vodka because Absolut is a brand that specializes exclusively in vodka production. The base spirit used in all variations of Absolut vodka is vodka itself, which is typically made from fermented grain or potatoes. At the core of the brand's identity is its commitment to producing high-quality vodka, and this is reflected in the various flavored versions of Absolut that maintain a vodka base. There are no variations of Absolut that divert from this foundational spirit, making vodka the common denominator across all its products.

The other options represent different types of spirits altogether. Gin is made by distilling grain and infusing it with botanicals, tequila is derived from the agave plant, and rum is produced from sugarcane or molasses. Each of these spirits has distinct production methods and flavor profiles, separate from vodka's characteristics. Thus, vodka stands out as the singular base for all variations of Absolut, affirming its essential role in the brand's offerings.