Read the following context and choose the best option to answer the question.
Context: No one else in the room , I walked towards the door to get out but found it locked . I walked behind the bar but there was no liquor - strange , as Darius always kept the place well - stocked . I grabbed a glass and filled it with cola from the soda gun and sat down at the bar .
Question: What 's a possible reason the writer filled a glass with cola ?
Options: 
- The door was locked .
 - Darius kept the place well stocked .
 - No one else was in the room .
 - None of the above choices .


None of the above choices .