Theater effect: refers to the phenomenon that the collective order is unbalanced and the overall interests are damaged because individual members pursue the maximization of their own interests and cause other members to follow suit. Which of the following are theater effects:. ["Xiaoming participated in a high-priced tutoring class. After Xiaofang's parents knew it, she reported a more expensive one. They felt that if he didn't, Xiaofang's performance might not be as good as Xiaoming's.", 'The e-commerce platform launched a variety of promotional methods during the small holiday, and some of them played a trick of raising prices first and then discounting, which seriously affected the overall credibility of the platform.', 'In recent years, the car sales battle has intensified. Several major manufacturers first advertised on TV stations and newspapers, but later evolved into high prices and asked celebrities to endorse.', 'Considering that there are large-scale activities on Xianxia Road, Xiaowang chose to work on the Chunguang Road that is not usually taken. However, it was unexpected that everyone would walk along this road, which caused the Chunguang Road to be severely blocked.']