What is the recipe for a classic Cosmopolitan?

The recipe for a classic Cosmopolitan is accurately depicted in the first choice, which consists of 1 oz of vodka, 1/2 oz of triple sec (an orange-flavored liqueur), 1/2 oz of lime juice, and a splash of cranberry juice, garnished with a lemon twist.

This combination highlights the balance between the sweetness of the triple sec and the tartness of the lime juice and cranberry juice, creating a refreshing cocktail that is both visually appealing and flavorful. The vodka serves as a neutral base that allows the other ingredients to shine, while the garnish adds a touch of elegance and enhances the drink's aromatic profile.

In contrast, the other choices do not reflect the traditional Cosmopolitan recipe. For example, a mixture including grenadine and tonic would yield a different flavor profile entirely and does not embody the essence of a Cosmopolitan. Additionally, ingredients such as gin with vermouth and fruit garnishes or rum with pineapple juice suggest entirely different cocktails, further underscoring that the specific combination of ingredients in choice A is essential to recreate the sought-after taste and experience of a classic Cosmopolitan.