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:
0. The door was locked .
1. Darius kept the place well stocked .
2. No one else was in the room .
3. None of the above choices .
Answer: 3