Final answer:
The correct verb to fill in the blank is 'Puedes', which means 'Can you' in Spanish.
Step-by-step explanation:
The correct verb to fill in the blank in the question '¿Usted ___ repetir la pregunta?' is option C, 'Puedes'.
This is because 'Usted' is the formal singular form of 'you' in Spanish, and it requires the corresponding verb form. In this case, 'Puedes' is the correct conjugation of the verb 'poder' (to be able to) in the second person singular, present tense.
Therefore, the correct sentence is '¿Usted puedes repetir la pregunta?' which translates to 'Can you repeat the question?'
Learn more about Spanish Verbs