1) la camiseta
This is because this is an item of clothing, whereas the other 3 words have to do with books.
Answer:
estan, estamos, Estoy, estan, esta, esta.
Explanation:
It would be A.) Mi hermana se <span>cayó y está inconsciente.
This translates to my sister fell and is unconscious, which best fits the conversation.</span>
Conjugating a verb? That's what I would call it, but honestly, not hundred percent sure what you are talking about.