It would be cómica because the subject is feminine and singular, so therefore use cómica because it is also feminine and singular.
1. Sirvió
2. Consiguieron
3. Pediste
4. Preferí
5. Durmió
6. Siguieron
I had a question like this for my class a long long time ago when I was in elementary school kind of and if I’m correct the answer was B for my class but it could be different for you
