What are the main ingredients in a classic Margarita?

The classic Margarita is traditionally made with tequila, lime juice, and triple sec, making option C the correct answer. Tequila is the foundational spirit in a Margarita, providing its distinctive flavor. Lime juice adds a tartness that balances the sweetness of the triple sec, an orange-flavored liqueur. This combination creates the refreshing and tangy profile that margaritas are known for.

In contrast, the other options include ingredients that do not align with the classic ingredients of a Margarita. Vodka, gin, rum, and their respective mixers do not belong to the classic Margarita recipe. Each spirit and mixer listed in the other options corresponds to different cocktails rather than the Margarita, highlighting the unique composition that makes option C the correct choice.