Answer:¿Abuela, me puede traer ese libro, por favor?
¿Abuela, me puede decir que horá ès, por favor?
Explanation: The 'usted' isn't used because the formality is adjusted to the question or statement.
Answer:
usted
Explanation:
usted is more formal. if not certain which to use, use usted instead of tú considering its better to be more formal than less formal.
B) delante de it does not make sense
