Co-pilot law: Refers to the person sitting next to the driver who often likes to point and comment on the driving process according to their own experience. It refers to the words, behavior or mentality of the onlookers who instruct others to complete the operation process based on their personal experience. Which of the following is the co-pilot rule? ['As soon as Lao Li got on the train, the coach turned on the driving training voice prompt system: "Please fasten your seat belt" and "Release the handbrake" . Lao Li observed the coach\'s expression while operating.', 'Xiao Zhang always likes to sit in the front row while chatting with the driver, and talks with the driver about the north and south. He also commented from time to time on the driving standards of other drivers on the road.', 'The most lively public square in summer is chess. Chess fans are standing around each table, and every move of the two players is pointed.', 'Manager Feng submitted the preliminary plan for personnel adjustment to the chairman for review. The chairman circled a few people after reviewing it, and gave him a few words, and asked him to take it back and revise it.']