Answer 2 is wrong because you have to lower the trunk when traveling on the highway.
When running on a bad road, many potholes should be driven slowly so that the body of the vehicle does not shake strongly, does not cause a "ben" deviation; when entering a roundabout need to slow down, do not take the wheel urgently and without emergency braking.
When running on the highway, there is no need to lower the car's trunk.
When unloading, you must choose a position with a hard and flat road, stop the vehicle completely, pull the handbrake tight; then control the lifting mechanism "ben" to dump the goods, after emptying the goods, lower the box.