While driving on an expressway, you notice that part of the load you were carrying has fallen onto the road. What is the most appropriate response?

1. ①Stop right there in the lane and run back to pick up the load
2. ②Reverse along the shoulder back to where the load fell
3. ③Turn on the hazard lights, stop in a safe place such as the shoulder, stay out of the lanes, and report it to the police or other authorities so it can be removed
4. ④If the item looks small, other cars will avoid it, so carry on to your destination