Read the following context and choose the best option to answer the question.
Context: 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 . )
Question: What is a reason that the writer would be awake at 3 AM ?
Options: 
A. The writer values a good night 's sleep .
B. None of the above choices .
C. The writer has to be awake early for work the next day .
D. The writer has insomnia .


D