Question

choose the best response to the following question ¿a qué hora es la clase? son las nueve. a las nueve. es las nueve. a nueve.

Explanation:

The question "¿A qué hora es la clase?" asks about the time of the class. "A las nueve" is the correct way to say "at nine o'clock" in Spanish to answer this question about time. "Son las nueve" is used to state the time in general, like when someone asks what time it is. "Es las nueve" is grammatically incorrect as "es" (singular) doesn't agree with "las nueve" (plural). "A nueve" is an incorrect and incomplete way of stating the time.

Answer:

B. A las nueve