The birdcage effect means that after people accidentally obtain an item that they don't need, they will continue to add more related things that they don't need. According to the above definition, Which of the following are consistent with the birdcage effect:. ['Li Yan bought a lot of things that are not needed in order to participate in an e-commerce platform full of 199 minus 100.', 'Zhang Lei gave Aunt Liu a big fish. In order to pack the fish, Aunt Liu bought another tool for scraping fish scales.', 'When the unit opened its annual meeting, Xiaoli picked up a mobile phone. On the same day, she bought a mobile phone case online.', "The neighbor gave Xiaomi a fish tank, so she bought some fish and put it in, although she didn't like raising fish."]