Answer:
Here you go, hope this helps
Explanation:
1. Tus
2. Su
3. Nuestros
If you want to wait for someone else to answer is good. All Spanish talks are different and from my language this is how I would say it.
(1) se habla español
(2) se lee libros
(3) se come
(4) se prescribe
(6) se puede
The answer to your question will be C
