In large amusement parks, live performances can be used to guide the flow of people. Performances during lunchtime are to reduce the pressure on the restaurant in the park; performances in the evening time have a completely different purpose and encourage visitors to stay for dinner. Performances at different times have different purposes, but behind this, there is a unified potential goal. What is the potential goal of this unification? ['Minimize the number of people queuing at each tourist site.', 'Attract more people to live performance to increase profits.', 'Minimize traffic congestion caused by visitors entering and leaving the park.', 'Maximize the role of the restaurant in as much time as possible.']