Last night , I fell asleep in the middle of Project Runway . I managed to put down my knitting mid row , but I was fully clothed and without a pillow or blanket . I only intended to close my eyes during a commercial but slept right through till morning . I did wake up with a blanket as my nocturnal vampires children discovered me and managed to cover me up after figuring out that I was still breathing but not budging . That 's how chemo plus two days seems to be going . Today , I was right as rain .
According to the above context, choose the best option to answer the following question.
Question: Why is the speaker so tired ?
Options:
A. They were up to late the night before .
B. They have chronic fatigue syndrome .
C. They are going through chemo .
D. None of the above choices .


C