The service chain is a service industry company that provides services to consumers to meet consumers' needs to the greatest extent, and provides consumers with a good consumption environment and various services in the consumption process. These services are based on modern information technology, logistics technology, and systems. Based on modern science and technology, such as engineering, with the starting point of meeting the needs of consumers to the greatest extent, all aspects related to service are organized in a certain way to form a complete service system. According to the above definitions, which of the following can constitute a service chain? ['A waste recycling station set up by several scrap purchasers in a community to recycle used electrical appliances.', 'Major shopping malls and home appliance repair companies related to the sales of a brand of computer.', 'c. Developer and new real estate bidding property company, many property companies come to compete.', 'In order to provide more convenience for students, the school set up bank outlets and supermarkets in the dormitory area.']