Read the following context and choose the best option to answer the question.
Context: 15 minutes later she resigned to the fact that she could be in there all day long so she started looking around . That 's when she noticed the 6.5-inch gap above and below the otherwise impenetrable door , and a bulb went off inside her dome .
Question: Why is the narrator expressing some optimism ?
Options: 
- None of the above choices .
 - The narrator feels they are about to get a new job .
 - The narrator feels they found an escape route .
 - The narrator feels they are about to be rewarded .


The narrator feels they found an escape route .