617 Text questions Choose 1 answer

Which statement about preventing cargo from falling off a truck is the most incorrect?

1. ①Use chocks or cargo supports for cargo that rolls easily.
2. ②When loading construction machinery, use wires, ropes, etc.
3. ③When there is space at the front, rear or sides of the cargo bed, use stopper blocks, etc.
4. ④Violating the cargo fall-prevention rule carries a 50,000-won traffic fine and 10 penalty points.