Read the following context and choose the best option to answer the question.
Context: I could not doze off , I just felt so helpless . I was having fever . I could not swallow any panadols with an empty stomach so I just stayed in bed , shivering away . I felt like throwing up every single second .
Question: Why could I not doze off ?
Options: 
A. Because I had an empty stomach .
B. Because I stayed in bed .
C. None of the above choices .
D. Because I could n't relax .


D