Answer:
1. Yo recomiendo
2. Yo apuesto
3. Yo recuerdo
4. Yo sonrío
5. Yo despido
6. Yo demuestro
7. Yo sirvo
8. Yo niego
9. Yo cuento
10. Yo tropiezo
Explanation:
If you want to refer to person singular form you have to use the word yo which means I in spanish.
I think its B or C but im not to sure
I believe it is seria because una estudiante is feminine not masculine
