40) Slots and slats are both designed into a wing to ensure a smooth flow of air over the wing in all configurations. The primary difference is that slots and slats a) are passageways within the wing itself, move out at high angles of attack b) move out at high angles of attack, are passageways within the wing itself c) are located near wing's leading edge, are located near wing's trailing edge d) are located near wing's trailing edge, are located near wing's leading edge