Norm refers to the expectation that people are required to act, how to think, and how to experience in a specific environment. It is a relatively fixed behavior. Based on the above definition, which of the following behaviors embodies the norm? ['A person who has lived by the sea from a young age worked in the grassland and slowly adapted to life there.', "Lawyer's calm, steady, objective and sense of justice in court.", "Xiao Zheng is wearing a vest and shorts and wearing slippers on her feet to attend a friend's wedding.", 'In order to make everyone have fun, we have developed new rules of the game.']