Objects in image: Door, Door handle, Mobile phone
Text visible in image: CLOSE, DOORS, BEHIND, YOU, ALARM, WILL, SOUND, Do, NOT, ENTER, this, doorway, unless, you, Make, certain, it, CLOSES, FIRMLY, behind, you
Question: what must you do if you enter the doorway?
Answers: close doors behind you, close firmly, make sure the door closes behind you, make certain it closes firmly behind you, close it firmly behind you, make certain it closes firmly behind you, closes behind you, close door , make sure the door closes behind you firmly, close door behind you