It 's a tiring day . I slept really late ( or early ) this morning and I could barely think right before I speak . I ' m always having this half a second lag when I talk .
According to the above context, choose the best option to answer the following question.
Question: Why is the narrator failing to wake up early ?
Options:
A. None of the above choices .
B. The narrator does not get enough sleep .
C. The narrator has a medical condition .
D. The narrator has kids .


B