Luke 's fish died . Just before I was going to put the boys down for the evening , Wendy came upstairs and mentioned to me in a somber whisper , " Luke 's fish died . Should we tell him now , or should we wait till the morning ? " I could n't stand the idea of my son sleeping peacefully while his fish was belly up in the tank , so I said she better go tell him right away .

Q with options: Give answer the following question using evidence from the above passage: Why might Luke not sleep well that night ?
Select from:
[I] None of the above choices .
[II] He has to take care of his fish
[III] He has sleep issues
[IV] He is upset by a loss
[IV]