Answer:
The correct answer is the option C: SATB.
Step-by-step explanation:
On one hand, a large mixed chorus is the name given, in the music area, to the group of peoplo who tends to sing together after having a lot of practises. This type of choir, the chorus, is the one that includes a large group of both men and women that sings in an opera mostly.
On the other hand, SATB is the acronym by Soprano, Alto, Tenor and Bass whose definition gives the voice types of the people that sing in the chorus and normally these voice parts are the ones that are included in the chorus.