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 with options to choose from: What may be the reason she could be there all day ?
Options are:
-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 .