Answer:
I put..
Most of the time grammar comes after 'common sense" which is inevitable. Grammar rules don't matter anymore when it comes to informal conversation. The grammar rules mainly only apply to a formal conversation it does not apply to the informal conversation. the grammar rules errors are only pinpointed when only we don't understand the sentence or it does not make any sense.
Explanation:
The person above me was helpful but I didn't want to copy them!!
It also didn't tell me my grade so I hope this is good :)
Answer:
The correct answer is " Ellos cantan en la clase de coro."
