Fission thinking refers to the fact that when thinking and solving problems, it is not restricted by known or ready-made methods, rules and categories, and radiates outward from the center of a problem to carry out multi-directional, multi-angle, multi-level thinking. According to the above definition, Which of the following situations embody fission thinking:. ['researcher from a company designed and made a multifunctional stationery box, which contains most of the stationery used by students.', 'A slaughterhouse divides beef into fat and lean meat, and sells it into burdock, beef tendon, beef louver, beef tongue, etc. for sale.', 'Sand fleas drilled out of the beach at high tide, foraging in the seawater, and drilled into the beach at low tide. Someone imitated the sound of sea tide at low tide, and caught a lot of sand fleas.', 'The tide time is postponed 48 minutes a day backwards, and damselfishes are delayed by about 50 minutes a day to go to the sea for food, so they are always the first diners on the beach.']