Final answer:
The correct answer is D. los. Direct object pronouns are used to replace nouns to avoid repetition in Spanish sentences.
Explanation:
The correct answer is D. los. In the sentence '¿quieres ver a tus amigos? Sí, quiero verlos,' the direct object pronoun 'los' is used to replace 'a tus amigos' for 'them.' This is a common practice in Spanish to avoid repetition of the noun.
Learn more about Direct Object Pronouns in Spanish
