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 6.5 inch gap at the bottom of the door significant ?
Option 0: None of the above choices .
Option 1: The gap " might " be large enough for her to squeeze through .
Option 2: The gap might be large enough for her to read her book by the light .
Option 3: The gap is large enough to fit her pet bird through .
Answer: 1