Final answer:
The most appropriate object to fill in the blank in the dialogue is 'te'
Step-by-step explanation:
The most appropriate object to fill in the blank in the dialogue is te. In the question, the speaker is asking if the other person can hear them, so the correct answer is the object pronoun for 'you' in Spanish. 'Te' is the object pronoun for the second person singular familiar form in Spanish.
Learn more about Object pronouns in Spanish