Which ingredients are used to make a Negroni?

The Negroni is a classic cocktail that traditionally consists of equal parts of gin, sweet vermouth, and Campari, which is a type of bitter. The choice identified provides the correct components, as it lists gin, bitters, and sweet vermouth. While the term "bitters" may typically refer to products like Angostura bitters, in the context of a Negroni, it is often understood that the key bitter element is Campari.

The presence of gin is crucial as it serves as the base spirit, providing the cocktail with its primary flavor profile. Sweet vermouth contributes richness and sweetness to balance the bitterness from Campari. This combination creates the Negroni's distinctive bitter-sweet flavor that is enjoyed by many.

The other choices do not accurately represent the Negroni. For instance, using dry vermouth instead of sweet vermouth or listing various juice elements alters the essential balance that defines this particular drink. Understanding these foundational components is key to making a classic Negroni.