Read the following article and answer the question by choosing from the options.

I happened to be at work but told him to call me later , that I might still be awake . Because I am typically awake at 3 in the morning . ( Since you can not see me , I just used air quotes when typing the word typically . )

What is a reason that the writer would be awake at 3 AM ?
Choices: i. The writer values a good night 's sleep .; ii. None of the above choices .; iii. The writer has to be awake early for work the next day .; iv. The writer has insomnia .;...A:
iv.