A usted because its formal.
Eres alto translates to you're tall and Usted es alto translates to You are tall.
So I'm going to go with D
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Por ejemplo, puedes decir, mi madre me lleva ha escuela todos los días en su caro. Cuando ella no puede hacer eso, me monto en el autobús.
Answer:
1. What are you doing now?
2. Do you like glasses more?
3. Do you prefer the long or short dress?
4. Do you know these are my favorite albums?
5. Is it a finance department?
6. Is it a department of treasury you bought this year?
7. Did you bought a car this year?
8. Is it the most elegant shop in the center?
