Unfair competition means that an enterprise uses improper or unfair means to increase the market share of its products, which creates an unfair market environment for competitors producing similar products and seriously damages the interests of its competitors. By definition, Which of the following behaviors are not unfair competition:. ['A food factory sells our instant noodles at a price lower than the cost, causing the original best-selling B food factory instant noodles to be unsaleable.', "In the 1980s, IBM invested a lot of money in the development of key technologies for ultra-large computers. After successful application for patents, IBM's overwhelming situation in the ultra-large computer field in the 1980s.", "Company A and Company B both produce weight-loss medicines. In order to expand its market share and increase sales profits, Company A made a publicity on TV stations and some newspapers, pointing out the shortcomings and side effects of Company B's drugs, which led to consumers refusing to buy them. Company B's products.", 'In order to compete with Company B for market share, Company A made a movie advertisement showing that a fighter with the emblem of A dropped a heavy bomb on the warship (marked B).']