Context: I rarely go to bed at a decent hour when my husband is away , but this time , I did n't go to bed at all for over 24 hours and when I did go to bed , it was for two - hour spurts here and there . My husband approved of the new arrangement , but asked me what prompted the re - re - re - arrangement . " I thought my nephew was going to die and I could n't sleep . I could n't just sit there , either , so I made busy work for myself . "

Question: Why could n't they sleep ?
Options:
0. None of the above choices .
1. Because they ate too much chocolate .
2. Because they have insomnia .
3. Because they had too much on their mind .
Answer: 3