I slept for most of the day , as I was exhausted . Then , Holly and I hung out for awhile , before taking the bus into Denver to catch up with a bunch of her writing friends . ( Holly writes too ! She 's good !
According to the above context, choose the best option to answer the following question.
Question: What may be the reason for them being so exhausted ?
Options:
A. They have a medical condition that causes restlessness .
B. They were up late the night before .
C. They have insomnia .
D. They are pregnant .


B