Loading baggage hazmat1 of 3
Where must you not allow riders to leave carry-on baggage?
The answer
Answer: D. There should also be nothing in the aisle that might trip other riders. Under a seat, on the lap and in an overhead rack are acceptable places, but a doorway or aisle blocks the way out in an emergency and can trip riders, so carry-ons must not be left there.
Source: 4.2 - Loading and Trip Start