A school bus emergency exit door is equipped with a release handle that requires two separate motions. Under FMVSS 217, why might multiple low-effort motions be acceptable?

1. Emergency exits should be hard to open to prevent tampering
2. Any number of complex motions is acceptable
3. FMVSS 217 allows specified simple release motions within force limits; design must still permit rapid emergency use
4. Release motion requirements do not exist