What must you verify regarding the emergency exits on a commercial passenger bus during a daily inspection?

1. That the exit signs are printed in at least three languages
2. That they are unobstructed, clearly marked, unlock easily, open fully, and the warning alarms function (if equipped)
3. That the emergency windows are sealed shut with silicone to prevent leaks
4. That the emergency exit doors are locked with padlocks during transit to prevent passenger exits