Final answer:
The appropriate verb to fill in the blank is 'tiene'. This is because the question is asking 'How old are you?' and the verb 'tener' (to have) is used in Spanish to express age.
Step-by-step explanation:
The appropriate verb to fill in the blank is D. tiene.
This is because the question is asking 'How old are you?' and the verb 'tener' (to have) is used in Spanish to express age.
For example, if the blank is filled with 'tiene', the sentence would read '¿Cuántos años tiene Ud.?' which translates to 'How old are you?'.
Learn more about Using the verb 'tener' to express age in Spanish