Question

to which question below might you receive this response:
\a las ocho.\
(hint: class subject=spanish)
\¿cuándo es tu clase de historia?\
\¿cuándo es tu clase de español?\
\¿a qué hora es tu clase de inglés?\

Explanation:

"A las ocho" translates to "At eight" in English, which is a response to a question asking about a specific time.

1. "¿Cuándo es tu clase de historia?" means "When is your history class?"; "cuándo" can refer to date or general time, but the response is a specific hour.
2. "¿Cuándo es tu clase de español?" means "When is your Spanish class?"; same as above, it asks for a general time/date, not a specific hour.
3. "¿A qué hora es tu clase de inglés?" means "What time is your English class?"; this question specifically asks for a time (hour), which matches the response "A las ocho".

Answer:

"¿A qué hora es tu clase de inglés?"