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 .
What may be the reason she could be there all day ?
Pick the best answer from the following options:
- None of the above choices .
 - There was hardly anyone in the building .
 - There was a long waiting list to get in .
 - There was no one working there at the time .


There was a long waiting list to get in .