Answer:
A mis amigos les gusta tomar sus refrescos con limón.
Explanation:
The correct answer is what's called "pronombre posesivo", in English: possessive pronoun. A mis amigos les gusta tomar sus refrescos con limón. In English: my friends like to have their sodas with lemon. With the pronoun we indicate that the subject we are referring to (in this case, the sodas) belong to the people we are talking about (in this case, my friends).
