Read the following context and choose the best option to answer the question.
Context: This morning I ended up being so nervous that I threw up . Twice . Wow this totally makes logical sense Jamie . I should n't have been THAT nervous , I do n't even know why I was . So I went through my first periods without a problem .
Question: Why may the narrator be nervous that she throws up ?
Options: 
A. She is feeling stress from home .
B. She is feeling stress from work .
C. School is causing her stress .
D. None of the above choices .


C