Context: Woke up at 3:30 am , could n't get back to sleep . It sucks . Two days ago I was still drowsy and sleeping all the time . I still want to sleep all the time , but it is not happening .
Question: What may be the reason I can not go to sleep ?
Option 0: I have to work nights ,
Option 1: I have insomnia .
Option 2: I have to study .
Option 3: None of the above choices .
Answer: 1