The survey shows that 59.4% of the public feel that the phenomenon of "reverse elimination" is widespread in the current society, and 18.8% of them feel "very much. " The so-called "reverse elimination", in short, means that bad elimination is good, and poor quality is eliminated Outstanding, mediocre elimination and other phenomena. According to the above definition, which of the following is the following is the phenomenon of reverse elimination? ['A company has a leading satellite phone technology with high voice quality and wide coverage, but the maintenance cost of the technology is high. Later the company made ends meet and declared bankruptcy.', 'Some expensive cough medicines in the market are not as effective as commonly used medicines at low prices, but in fact, commonly used medicines have a small market share.', 'Many companies have people who complain about their work. As a result, any company that has complained about their work must be more successful than a company without such people.', 'A graduated from a prestigious university and B who graduated from an ordinary university entered a well-known international company at the same time, but A has not been promoted, but B has gradually been recognized by the company.']