Read the following context and choose the best option to answer the question.
Context: I did n't get to bed until 6:30 AM and kept waking up , finally getting out of bed at 10:30 . I drank so much coffee to stay awake last night I ' m still all twitchy . My mind is racing all over and my body struggles to keep up .
Question: What may be the reason I drank so much ?
Options: 
- I had to watch tv .
 - None of the above choices .
 - I had to watch a movie .
 - I had to study .


I had to study .