She goes inside.

Jen opened the door and found herself in a small room with violet walls. The single round ceiling lamp was lighting the room very weakly, just enough to see its edges and the outlines of three elevators. The screens near each of them had slightly brighter light settings, so it only took a few seconds for the girl to adjust her eyes to the new environment.

"3/3" "3/5" "3/8"

Apart from these numbers on the screens, the three elevators were absolutely identical in their appearance. Apparently, she only had access to one of them and there were no other passages in the room, so there was nothing to choose out from... right?